600-251 Maxx. Learn More Shocker Series. The heads use a standard LS 15-degree valve angle with a 1. This is Part 13 of my Ford 331 stroker motor rebuild. ProMaxx Performance 175cc Aluminum Cylinder Heads Small Block Ford 5. hidden pictures jason rekulak does chegg charge you right away reddit hindman funeral home obituaries taco loco east rutherford menu papa johns delivery hours. LOW BUCK BBC HEAD TEST-PROMAXX VS AFR - YouTube © 2023 Google LLC FULL DYNO RESULTS-340 PROMAXX VS 345 AFR-CHEAP VS BRAND NAME? CHECK OUT THIS VIDEO COMPARING THE FULL CNC PROMAXX 340. With ultra-smooth Grade A 356-T6 aluminum castings that are precision machined, these small block Ford heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque you've sought for your setup. Sep 15, 2015 · ProMax is working with a Chinese company that does very nice work. This cylinder head has exhaust 45 and intakes 60 degrees. The SBF Maxx 180 is an as cast head that beats the competition. Add To Cart. 100% CNC Ported. A magnifying glass. 00 CALL TO VERIFY PRICE AND AVAILABILITY FOR THIS UNIT Quick Overview: Ford 408 Stroker Dyno - Raw Exhaust Sound Only! Watch on. 00) 1x Project X SBF 210 (SOLD IN PAIRS) $1,266. 575 in (Late Model Restoration always recommends to double check PTV when installing a new set of heads or cam regardless. This is Part 13 of my Ford 331 stroker motor rebuild. Our RENEGADE line of cylinder heads for the small block Ford, feature 100% 5-AXIS CNC ported intake, exhaust and combustion chambers; available in street . Don't let the size fool you, flowing over 260 cfm, this head makes real power. Learn More Shocker Series. Sep 15, 2015 · ProMax is working with a Chinese company that does very nice work. The crown jewels of RHS are the Pro Elite line of heads. Generally when buying heads, especially lower cost heads it's a good idea to buy them bare then select your own valves and match the springs to the cam with the. Like already mentioned, much of the recipe is in the heads and cam. 31 gear. That’s what we call getting Maxxed Out! Sources: ARP, Arp-bolts. 00 The Shocker 210 CNC SBF heads are tops in the industry. The 210cc ProMaxx heads feature intake ports that flow over 320 cfm. rob Registered. 00 Add To Cart Compare Wish List PROMAXX Performance Freedom Series Small Block Chevy Cylinder Heads 2121. PROMAXX Performance Cylinder Heads - Free Shipping on Orders Over $99 at Summit Racing Intake Runner Volume (cc) Exhaust Runner Volume (cc) Cylinder Head Style Cylinder Head Material Intake Port Shape Intake Valve Diameter (in. 60 stainless-steel valve package. PROMAXX Performance Products specializes in all types of automotive cylinder head for any budget, carrying Performance cylinder heads, diesel cylinder heads and stock replacement cylinder heads. Oct 24, 2019 · An intake manifold for <$200 is an easier pill to swallow vs >$500 for a set of heads. 295\65 drag radials. Maxx Series Small Block Ford Heads, Bare. Products ( 1 - 10 of 906) Sort By PART #: RHS-12046 RHS 12046 Pro Action SB Chevy. Go out and shock the competition. Engine runs great and not looking for new heads, but I was looking at the AFR 195 Enforcer heads. MAXX 290 BBC. I got to looking at the advertised flow numbers for the AFR's. With ultra-smooth Grade A 356-T6 aluminum castings that are precision machined, these small block Ford heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque you've sought for your setup. 60 valve package. This cylinder head delivers great throttle response. These heads work on a stock block and take advantage of the 18 bolt head bolt pattern found on the “R” series blocks from Mopar Performance. Dec 3, 2020 · thats a big negative. ProMaxx Performance MAXX Series Bare Aluminum Cylinder Heads Small Block Ford - As-Cast MAXX Series Bare Aluminum Cylinder Heads Small Block Ford As-Cast 180 cc Intake Ports 60cc Combustion Chambers 2. 50 Stainless Valves (2. The best way to compare cylinder heads is to bolt them on an engine and do a series of dyno test runs to see how they perform. See all 20 photos After back-up. PROMAXX Performance Maxx Series Small Block Ford Cylinder Heads 9175 Cylinder Heads, Aluminum, 180cc Intake Runner, 60cc Chamber, Ford, Small Block, Pair Part Number: PMX-9175. ): 2. With an emphasis on completeness, the innovative head kits include cast aluminum hemispherical-style valve covers, Jesel 1. Normally I would have classed them with the ProMaxx, E-Street and. 8L Part Number: 723-1102 Click image to zoom $1,232. In addition to the LS head, ProMaxx decided to dive into a world where an affordable aluminum cylinder head isn’t exactly commonplace — the diesel market. Topping our 347 stroker short-block was a set of ProMaxx aluminum heads. 0 motor. These 190cc heads are on Summit for $1010 for a pair. 60'' Exhaust Valve Sizes. 055 valve and complete port work with some dyno tweeking I can get . We’ve done a nice Dart 427 short block (Ford) for a client that had aluminum heads, it made around 450 with disappointment all around. PROMAXX Performance Maxx Series Small Block Ford Cylinder Heads 9175 Cylinder Heads, Aluminum, 180cc Intake Runner, 60cc Chamber, Ford, Small Block, Pair Part Number: PMX-9175. ProMaxx Performance MAXX Series Bare Aluminum Cylinder Heads Small Block Ford - As-Cast MAXX Series Bare Aluminum Cylinder Heads Small Block Ford As-Cast 180 cc Intake Ports 60cc Combustion Chambers 2. 0 are worth around 70 whores with the usual bolt ons to support, thats a lot of whores. SBF 175 ProMaxx Cylinder Head [9175] - $924. 7L, 5. Equipped with Hooker headers, the 393 stroker was run first with the stock iron 5. 1 user CarMichael Angelo my rearend will smell so minty fresh, 15 Year Member Nov 29, 1999 10,641 9,246 234 Birmingham, al Oct 24, 2019 #5 It's a set of heads. 200cc heads, dual plane manifold, quickfuel 750ss carb, Howards 180345-10 hyd roller, flat top 2 valve relief pistons, 10. Add to cart. I have the ProMaxx 190cc, 64cc combustion chamber heads on my 350. This cylinder head has a satin exterior finish. These heads work on a stock block and take advantage of the 18 bolt head bolt pattern found on the “R” series blocks from Mopar Performance. Project X SBF 185 (SOLD IN PAIRS) 1,229. Buy ProMaxx Performance 9175 at JEGS: ProMaxx Performance MAXX Series Aluminum Cylinder Heads As-Cast. Available with or without water jackets. 00 Learn More Series One We have taken our 100% CNC ported intake and exhaust runners and have made them into an “As-Cast” version. Maximum quality, maximum performance, and minimum pricing—PROMAXX Maxx Series SBF cylinder heads take affordable power to the next level. The castings are clean, hardness test is great, and when cut in half have quite a bit of meat in them. 575 in (Late Model Restoration always recommends to double check PTV when installing a new set of heads or cam regardless. They're working good for me, but you want bigger runners. It indicates, "Click to perform a search". com; ATI, Atiracing. We'll be pushing them to 400 here in the coming weeks. PROMAXX Performance Shocker Series Ford FE Cylinder Heads 92316. 210cc Intake Ports. ProMaxx's full CNC port head is quite good as well. We have seen these heads add over. Sep 6, 2017 · We previously ran these ProMaxx heads on a smaller 347 stroker, but with 210cc intake ports (that flowed over 320), the heads were better suited to a larger, more powerful stroker combination. When they began, co-owner Jason Collins set some lofty goals for their line of performance products. These Promaxx heads dont have a lot of runs or street time on them which. Nov 21, 2022, 2:52 PM UTC vb yy gb hu bn ct. Jan 13, 2021 · We’ve done a nice Dart 427 short block (Ford) for a client that had aluminum heads, it made around 450 with disappointment all around. Sep 8, 2017 · The 210cc ProMaxx heads feature intake ports that flow over 320 cfm. 7 Hemi Airflow @ 28” Flow tests below show results from our SAENZ 680 Flow Bench valves (2. Mar 9, 2021 · - headers /2. Pro MAXX. FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983. May 4, 2017 · The heads featured 210cc intake ports that flowed more than 320 cfm. Compare performance and price and you will see it is no contest. Add to cart. Project X SBF 210 (SOLD IN PAIRS) $ 1,266. Im noticing these have better flow numbers than the Tw170 but not. 60cc Combustion Chambers. Maxx 180 SBF(Sold in Pairs) Maxx 180 SBF. Jan 25, 2020 · The only difference between the Series One 175’s and the Maxx 180’s is the Maxx 180”s are bowl blended and work around the guide if needed (sometimes there is some casting flash that needs to be removed). Oct 24, 2019 · An intake manifold for <$200 is an easier pill to swallow vs >$500 for a set of heads. 00 : AD Performance, Your Source for Longblock Performance Parts Please leave a message LiveZilla Live Help Questions?. 210cc Intake Ports. I was planning to reuse my Gt40x heads but have enough funds for a head change. 60 "econo" ported") Holley 300-25 Strip Dominator intake ( gasket matched) JDR performance carb (820-840cfm) 1. Bare, 2/pkg. RHS offers two different sizes of CNC ports on these heads. Sep 15, 2015 · ProMax is working with a Chinese company that does very nice work. 3 @ 3900 rpm, HP 471. Spring Options. This is Part 13 of my Ford 331 stroker motor rebuild. 0L, 5. These Promaxx heads dont have a lot of runs or street time on them which. You fork out more money but if you're going to fork it out. 15" intake valve. 30 but still on the fence) Main goal is to have a nice stout 302 that will either hit between 280- 320rwhp, or have the Ingredients to hit high 12s and I'll be happy for the most part. 00 – $ 1,565. Project X SBF 185 (SOLD IN PAIRS) 1,229. Log In My Account cq. 60'' Valves 175cc Intake Runner 60cc Combustion Chamber. Aside from the good info on procomp heads, I think its VERY interesting to see that Vortec 170cc intake ports only give up 5hp to the 180cc Brodix AND the vortecs. Decided to swap out the Trickflow heads to ProMaxx because the Tricflows clear the 86. #3 · Sep 16, 2015. The 185cc series 1 heads are perfect for that budget build. 60, stainless-steel valve package. Assembled heads feature 21-4N Stainless Swirl back cut valves, studs and guide plates;. I bought my second pair over black friday. View Details. SBF 175 ProMaxx Cylinder Head [9175] - $924. 86 9 left in stock Lowest Price Guarantee MAXX Series Bare Aluminum Cylinder Heads Small Block Ford As-Cast 180 cc Intake Ports. I just built a 355 with ProMaxx Maxx 183 heads. If anyone is. Show results from. Complete Aluminum Cylinder Heads SBF fits Ford GT40 289 302 351W 190cc 62cc | eBay Find great deals for Complete Aluminum Cylinder Heads SBF fits Ford GT40 289 302 351W 190cc 62cc. True, the E7 heads are the weak link in the 5. Engine runs great and not looking for new heads, but I was looking at the AFR 195 Enforcer heads. This is NOT that cylinder head. 30 but still on the fence) Main goal is to have a nice stout 302 that will either hit between 280- 320rwhp, or have the Ingredients to hit high 12s and I'll be happy for the most part. Alot depends on the balance of your driveline, Correction Factors and the dyno operator. Buy ProMaxx Performance 9175 at JEGS: ProMaxx Performance MAXX Series Aluminum Cylinder Heads As-Cast. The first is designed for engines that are 468-540 cubic inches and features a 339cc. 525 lift cam, . $ 1,792. Cylinder Heads , BF200, Aluminum, Bare, 46cc Chamber, 248cc Intake Runner, Ford, 302, 351W, Pair Part Number: BRO-1040002 Not Yet Reviewed Estimated Ship Date: Mar 15, 2023 if ordered today Drop Ship Free Shipping. Formerly known as Patriot Heads which were absolutely terrible. com; CP Pistons/Carrillo Rods. Equipped with their CNC-ported, 340cc BBC heads (they also offer 370cc versions), this 572 thumped out an impressive 850 hp and 719 lb-ft of torque. Complete Aluminum Cylinder Heads SBF fits Ford GT40 289 302 351W 190cc 62cc | eBay Find great deals for Complete Aluminum Cylinder Heads SBF fits Ford GT40 289 302 351W 190cc 62cc. SBF 175 ProMaxx Cylinder Head [9175] - $924. hidden pictures jason rekulak does chegg charge you right away reddit hindman funeral home obituaries taco loco east rutherford menu papa johns delivery hours. 0L/302 PROMAXX Performance Cylinder Heads and get Free Shipping on Orders Over $99 at Summit Racing!. Any you hoonigans know for sure if promaxx heads are just procomps renamed?. Cylinder Heads, BF200, Aluminum, Bare, 46cc Chamber, 248cc Intake Runner, Ford, 302, 351W, Pair Part Number: BRO-1040002 Not Yet Reviewed Estimated Ship Date: Mar 15, 2023 if ordered today Drop Ship Free Shipping. 87 151 1. May 4, 2017 · The combination of the Funnel Web intake, COMP cam, and Promaxx heads worked well on the 347. AFR 165 - Available but low stock, seems to be the closest to restocking soon. We have seen these heads add over. PROMAXX Performance Shocker Series Ford FE Cylinder Heads 92316. With our tuning finally dialed in, the ProMaxx BBC heads demonstrated their worth on the 572 stroker by producing peak numbers of 850 hp at 6,800 rpm and 719 lb-ft of torque at 5,500 rpm. Don’t let the size fool you, flowing over 260 cfm, this head makes real power. We'll be pushing them to 400 here in the coming weeks. 60 valve package. Small Block Mopar Engine Edelbrock, speemaster or promaxx heads rscottick May 6, 2019 1 2 Next R rscottick 70 duster Joined Jan 20, 2013 Messages 26 Reaction score 11 Location waterford May 6, 2019 #1 Opinions on the three going on a 408 stroker any real world experience please. 00 - $ 2,180. Mar 6, 2021 · I just built a 355 with ProMaxx Maxx 183 heads. Couple that with a state of the art NEW casting and you have a home run. 2 SBF Ford Cylinder Head Shoot-Out This video is awesome. Part Number: PMX-92316. Our new swirl designed chamber is the difference. Couple that with a state of the art NEW casting and you have a home run. Don't let the size fool you, flowing over 260 cfm, this head makes real power. Bare, 2/pkg. I got to looking at the advertised flow numbers for the AFR's. 020 in. #NoNameNationals #Promaxx 1,421 views Premiered Feb 26, 2022 126 Dislike Share Bad Tree Productions 3. Dyno results show 20 to 35 hp gains over the competition. 00 The 185cc series 1 heads are perfect for that budget build. That’s what we call getting Maxxed Out! Sources: ARP, Arp-bolts. A head with 180 or 185cc intake runners will work well on a typical 350 Chevy street engine that makes 400 to 450 horsepower. Equipped with their CNC-ported, 340cc BBC heads (they also offer 370cc versions), this 572 thumped out an impressive 850 hp and 719 lb-ft of torque. Performance Cylinder Heads. 3 @ 3900 rpm, HP 471. I was planning to install the promaxx 9175 180cc heads on a DSS 331 and its just a street car, so am wondering if these heads would fit the bill. 8L Part Number: 723-1102 Click image to zoom $1,232. Retail price difference at the time might have been $1500, money well spent. PROMAXX Maxx Series SBF cylinder heads MAXX 180cc - 9175 https://promaxxperformance. SBF 175 ProMaxx Cylinder Head [9175] - $924. Find great deals on eBay for promaxx heads sbf. FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983. 60 "econo" ported") Holley 300-25 Strip Dominator intake ( gasket matched) JDR performance carb (820-840cfm) 1. 7:1 ratio rockers complete with rocker stand system, and all the necessary valve and spring assemblies as well as gaskets. M Mosse Registered. 00 : AD Performance, Your Source for Longblock Performance Parts Please leave a message LiveZilla Live Help Questions?. 020 Exhaust Valve Diameter. Show results from. With the stock cam it makes a great street motor. This is Part 13 of my Ford 331 stroker motor rebuild. I would recommend it for a budget head. Jason is a good guy who owns it now and the SBC heads look decent and improved over the old junk. roller up to. In addition to the LS head, ProMaxx decided to dive into a world where an affordable aluminum cylinder head isn’t exactly commonplace — the diesel market. Cylinder Heads , BF200, Aluminum, Bare, 46cc Chamber, 248cc Intake Runner, Ford, 302, 351W, Pair Part Number: BRO-1040002 Not Yet Reviewed Estimated Ship Date: Mar 15, 2023 if ordered today Drop Ship Free Shipping. The 210cc ProMaxx heads feature intake ports that flow over 320 cfm. MAXX Series Aluminum Cylinder Heads. 900 inches while offering the larger LS3 intake port, to breathe better than any cathedral port. I just built a 355 with ProMaxx Maxx 183 heads. 4cc comb chambers As you can see, these are extreme flow heads. 00 The 185cc series 1 heads are perfect for that budget build. AFR 225’s replaced those heads, now we’re in the mid 500’s, no other changes. All American Manufacturer of Racing Cylinder Heads and Intake Manifolds Pro-Filer Performance Products P. Enter your peak intake flow in CFM at 28" of water: (If you don't know this, webpages like the Stan Weiss head flow chart have flow data for hundreds of different cylinder heads, foreign and domestic. la follo dormida
00 : AD Performance, Your Source for Longblock Performance Parts Please leave a message LiveZilla Live Help Questions? Please leave a message x. . Promaxx sbf heads dyno
It has 10. All American Manufacturer of Racing Cylinder Heads and Intake Manifolds Pro-Filer Performance Products P. Nov 21, 2022, 2:52 PM UTC vb yy gb hu bn ct. changbin x reader nightmare. At less than $950 for the pair, these Edelbrock heads may be the best bang-for-the-buck investment of all the Ford heads in this test. Equipped with their CNC-ported, 340cc BBC heads (they also. 0L heads. Valve Option. I got to looking at the advertised flow numbers for the AFR's. 5 @ 3900 rpm, HP 474. 175cc Aluminum Small Block Ford Cylinder Heads. 8L 2. Im noticing these have better flow numbers than the Tw170 but not sure of their quality. Sep 15, 2015 · ProMax is working with a Chinese company that does very nice work. We previously ran these ProMaxx heads on a smaller 347 stroker, but with 210cc intake ports (that flowed over 320), the heads were better suited to a larger, more powerful stroker combination. com; ATI, Atiracing. All American Manufacturer of Racing Cylinder Heads and Intake Manifolds Pro-Filer Performance Products P. 00 – $ 1,431. The first is designed for engines that are 468-540 cubic inches and features a 339cc. This cylinder head has a satin exterior finish. They arent the best heads available but they certainly arent the worst either. This head will make BIG power in your SBF application. Find PROMAXX Performance Maxx Series Small Block Ford Cylinder Heads and get Free Shipping on Orders Over $99 at Summit Racing! Maximum quality, maximum performance, and minimum pricing—PROMAXX Maxx Series SBF cylinder heads take affordable power to the next level. AFR 225’s replaced those heads, now we’re in the mid 500’s, no other changes. I just reworked my cast dart heads for upgrades for next year 1. The 165cc and 185cc models are CARB Certified EO #D-250-3 for vehicles model year 1995 and older. Any idea what the afr 165's would produce w/306 and xe274 cam and headers? pong, Nov 7, 2010 #5 brainsboy Member. i put a sbf 302 together with 185 afr enforcer heads. PROMAXX Performance Products specializes in all types of automotive cylinder head for any budget, carrying Performance cylinder heads, diesel cylinder heads and stock replacement cylinder heads. Pretty sure they're china castings as promaxx was formerly known as patriot. Re: Promaxx 9175 sbf flow numbers by steve cowan » Tue Oct 01, 2019 7:22 pm I agree with PRH Won't take much for those heads to pick up Curious as what throat size and flange height and width. It puts out up to 20 hp over the competition. 100% CNC Ported. When they began, co-owner Jason Collins set some lofty goals for their line of performance products. On Jegs they were only $773 for the assembled pair, when on Summitracing they were $900 something. Promaxx mopar small block heads gx os. I got to looking at the advertised flow numbers for the AFR's. You fork out more money but if you're going to fork it out. The castings are clean, hardness test is great, and when cut in half have quite a bit of meat in them. Spring Options. I got to looking at the advertised flow numbers for the AFR's. Dec 16, 2019 · The ProMaxx small-bore LS3 head works with bore diameters as small as 3. 00 4 left in stock Lowest Price Guarantee 175cc Aluminum Cylinder Heads Small Block Ford 5. I just haven’t heard many reviews on these heads. No major work was done to these other than a basic gasket match job. Maximum quality, maximum performance, and minimum pricing—PROMAXX Maxx Series SBF cylinder heads take affordable power to the next level. Photo by Chris Welch / The Verge if on. I have the ProMaxx 190cc, 64cc combustion chamber heads on my 350. 99 Special Order $1,560. On Jegs they were only $773 for the assembled pair, when on Summitracing they were $900 something. Equipped with their CNC-ported, 340cc BBC heads (they also offer 370cc versions), this 572 thumped out an impressive 850 hp and 719 lb-ft of torque. 00 – $ 1,565. I would think Memorial Day or July 4th would be the next sale. Overall, the specs of the Enforcer heads are exactly what you would expect from a budget cylinder head. com; COMP Cams, compcams. com; ATI, Atiracing. The best way to compare cylinder heads is to bolt them on an engine and do a series of dyno test runs to see how they perform. 86 9 left in stock Lowest Price Guarantee MAXX Series Bare Aluminum Cylinder Heads Small Block Ford As-Cast 180 cc Intake Ports. That’s what we call getting Maxxed Out! Sources: ARP, Arp-bolts. 900 inches while offering the larger LS3 intake port, to breathe better than any cathedral port. I am fairly certain their SBF heads are pro-comps or some other off-short casting which they are CNC'ing and assembling. I was planning to install the promaxx 9175 180cc heads on a DSS 331 and its just a street car, so am wondering if these heads would fit the bill. 86 9 left in stock Lowest Price Guarantee MAXX Series Bare Aluminum Cylinder Heads Small Block Ford As-Cast 180 cc Intake Ports. Cylinder Heads, BF200, Aluminum, Bare, 46cc Chamber, 248cc Intake Runner, Ford, 302, 351W, Pair Part Number: BRO-1040002 Not Yet Reviewed Estimated Ship Date: Mar 15, 2023 if ordered today Drop Ship Free Shipping. roller up to. The SBF Maxx 180 is an as cast head that beats the competition. $ 1,415. It has 10. Servedio Cylinder Head Development 631-816-4911 9:00am - 9:00pm EST travis Guru Posts: 1481. I was planning to reuse my Gt40x heads but have enough funds for a head change. I would recommend it for a budget head. In addition to full CNC porting, the heads utilize 60cc combustion chambers and a 2. ) Rocker Arms: 3/8” Stud Mounted assembly Push Rods: Stock-length hardened push rods will work in most cases. changbin x reader nightmare. Don’t let the size fool you, flowing over 260 cfm, this head makes real power. *Dyno runs made w/BP 93, 10% Ethanol*. ProMaxx Performance Products, LLC, Rainbow City, Alabama. 60, stainless-steel valve package. Nov 21, 2022, 2:52 PM UTC vb yy gb hu bn ct. I would private message Eric Weingartner or Google Eric Weingartner Racing,should be able to find him. Project X SBF 185 (SOLD IN PAIRS) 1,229. Equipped with their CNC-ported, 340cc BBC heads (they also. 8L, Pair Part Number: PMX-9176 Not Yet Reviewed Estimated Ship Date: Monday 3/6/2023 (if ordered today) Drop Ship Free Shipping Special Order $979. ProMaxx heads have good reviews and i have a set on the 393w. Show more Show more Insane SBF Cylinder Head? Race Flow Development SC2 What Brand Of Head Is The Best 71K views 9 months ago. and a set of open dyno exhaust headers, and we were ready to rumble. Equipped with their CNC-ported, 340cc BBC heads (they also offer 370cc versions), this 572 thumped out an impressive 850 hp and 719 lb-ft of torque. 5786 likes · 23 talking about this · 9 were here. I don't say this lightly but as the video editor this is the best . its the new Chinese (dart copy I believe) casting that people are using. 10 Learn More Series One We have taken our 100% CNC ported intake and exhaust runners and have made them into an “As-Cast” version. Sep 29, 2019 · Re: Promaxx 9175 sbf flow numbers by Carnut1 » Sun Sep 29, 2019 5:53 pm I think for your application I would radius that throat cut in the exhaust, without increasing throat ratio. This head will make BIG power in your SBF application. promaxx are great heads for the money, they come with a good valve train and pac springs. I was planning to reuse my Gt40x heads but have enough funds for a head change. In truth, these heads were better suited for a 392 or 408 stroker, but this test would show they were equally at home on a milder 347 street motor (with the ability to grow). 575 in (Late Model Restoration always recommends to double check PTV when installing a new set of heads or cam regardless. Cylinder Heads, BF200, Aluminum, Bare, 46cc Chamber, 248cc Intake Runner, Ford, 302, 351W, Pair Part Number: BRO-1040002 Not Yet Reviewed Estimated Ship Date: Mar 15, 2023 if ordered today Drop Ship Free Shipping. Buy ProMaxx Performance 9175 at JEGS: ProMaxx Performance MAXX Series Aluminum Cylinder Heads As-Cast. It comes with a 450 to 550 RPM speed system. Without better heads its almost pointless to change the cam in a 5. Bare, 2/pkg. We’ve done a nice Dart 427 short block (Ford) for a client that had aluminum heads, it made around 450 with disappointment all around. 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