Air Flow Research Bbc Magnum 357Cc Full Cnc Comp Rect.121Cc Chamber 2010
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If "Dirty Harry"drove a racecar, it wouldcertainly be fitted with apair of AFR 357cc"Magnum" cylinderheads. If huge horsepower iswhat you are searching for,either of these castings willcertainly deliver. With fullyCNC ported 357cc flowing 425CFM, these cyilnder headsrepresent the ultimate inairflow for your BBChevrolet. Our 357"Magnum" flows over415 CFM @ .700 valve lift! Noother production style BBChevy head even comes close.These cyilnder heads weretargeted at larger cubic inchengines (509-632 CID) lookingfor maximum horsepower andrpm capability with a primaryoperating range of 3500-8000rpm's (This range is anaverage and will vary withengine displacement andcomponent selection). Aswell, these aluminum headsprovide impressive torquefigures at higher rpm levels.Blown, turbo, and nitrousengines will especially likethe larger, higher flowingintake ports. AFR BBC 357cccylinder heads will work bestwith camshafts exceeding .750gross valve lift to makebetter use of the substantialairflow found in the higherlift range. The 357cc comestandard with AFR's trademark.750" thick cylinderhead deck, reinforced rockerstud bosses, and are equippedwith premium one piecestainless steel 2.300"intake valves and 1.880"exhaust valves. Standardcombustion chamber volume is121cc for our 357cc BBC.Properly selecting thecorrect cylinder head dependson a large number ofvariables.
BasicPackage Components:- 5-angle valve job
- 100% CNC PortedChambers, Exhaust, and Intake
- Intake Valve,2.300" stainless steel
- Exhaust Valve,1.880" stainless steel
- 1.625 O.D. RollerDual Valve Spring withdampener 255 lbs. on seat,.750" maximum lift
- 10 Chrome MolyRetainer
- 10Valve Locks
- GuidePlates
- Viton ValveSeals
- Hardened SpringCup
- Intake ValveSeats
- Exhaust ValveSeats
- Bronze ValveGuides Intake
- BronzeValve Guides Exhaust
- AFR BB Chevy 7/16 ExhaustStuds
- AFR BB Chevy7/16 Intake Studs