AFR BBC 335 CNC Aluminum Cylinder Heads

Sale: $3,481.40
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AFR 335cc Fully CNC Ported Magnum BBC Cylinder Head

AFR’s Best of Both Solution


BBC 335cc Fully CNC ported Magnum Cylinder Head
Click to enlarge

Are you looking for big torque and big horsepower number? Our BB Chevy line of medium volume intake runners will provide you with exactly that. The phrase “having your cake and eating it to” would certainly be appropriate with their moderately sized intake runners producing tremendous flow figures across the entire lift range (Our CNC 335 flows 410 CFM!). These high flow/high velocity ports provide extreme versatility and fill the needs of many applications. From a max-effort high compression 454 to a 605 CID low rpm marine application, either one of these cylinder heads would be a great choice. These heads would also be ideal in a larger cubic inch “ Pro-Street” application with their broad torque range, as well as significant rpm and horsepower capability. These heads will work best with a primary operating range of 3000-7000 rpm’s (This range is an average and will vary with engine displacement as well as component selection). Both the 325cc and the 335cc come standard with AFR’s trademark .750” thick head deck, reinforced rocker stud bosses, and are equipped with premium one piece stainless steel 2.300” intake valves and 1.880” exhaust valves. Standard combustion chamber volume is 121cc for our 335cc BBC. Properly selecting the correct cylinder head for an application depends on a large number of variables. Please consult with one of our sales technicians to assist you in making the best decision for your particular application.



Optional stud girdle required for 2° rolled valve angles and 1” longer head bolts needed on four bottom exhaust bolt holes. Longer pushrods might also be required.(see footnotes here)

AFR 335cc CNC BBC Flow Chart

335cc BBC Cylinder Head Flow Chart


Basic Package Components
100% CNC ported intake ports, exhaust ports, and combustion chamber
Competition 5-angle Valve Job
AFR #7626Intake Valve, 2.300" stainless steel
AFR #7631Exhaust Valve, 1.880" stainless steel
AFR #80311.625 O.D. Solid Roller PAC Racing Spring, 275lbs on seat, .850 Maximum Lift
AFR #851810° Chrome Moly Retainer
AFR #900510° Valve Locks
AFR #6109Guide Plates
AFR #6611Viton Valve Seals
AFR #8046Hardened Spring Cup
AFR #9062Intake Valve Seats
AFR #9064Exhaust Valve Seats
AFR #9045Bronze Valve Guides Intake
AFR #9046Bronze Valve Guides Exhaust
AFR BB Chevy 7/16 Exhaust Studs
AFR #6407AFR BB Chevy 7/16 Intake Studs


Specifications, Features, and Optional Supporting Components
75 ft. lbs.Head Torque
AFR #6855Intake Port Gasket, 1.720" x 2.450" with 1/2" radius or Fel-Pro #1275
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6858Exhaust Port Gasket
AFR #6850Head Gasket, 4.540 bore Fel-Pro #1017
Mark V-VI-up to 4.500 Bore Fel-Pro #17048 or #1047Head Gasket
Mark V-VI-4.500 to 4.600 Bore Fel-Pro #17049Head Gasket
AFR #6306Head Bolts
AFR #6307Head Studs
AFR #6308Head Bolts
AFR #6320Head Bolt Washers
AFR #6210Stud Girdle
AFR #5500Suggested Manifold
Edelbrock #2927Suggested Manifold
Dart #6200, #6201, & #6203Suggested Manifold
Brodix HVH #2000, #2001, #2005, & #2006Suggested Manifold
Champion C59C Autolite 3932Spark Plug Starting Range
121ccCombustion Chambers
Can be cut to 1.750, no deeperSpring Pocket
StandardValve Spacing
StandardRocker Arms
24°/4° Intake, 15°/4° ExhaustValve Angle
.009" per ccAngle Mill (milling options available), 104 cc Maximum
.006" per ccFlat Mill (milling options available), 114cc Maximum

Note: Milling head deck will affect flow numbers. Angle mills might require a .120 thick intake gasket.

Add to Cart:

  • Model: 2001
  • Shipping Weight: 94lbs