AFR 335cc Fully CNC'd
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 cylinder 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 119cc’s on our 325 “As Cast” pieces, while the fully CNC ported 335 version comes with a 121cc chamber. Both are available with an optional 114cc combustion chamber as well. 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.
Note: Optional stud girdle required for 2° rolled valve angles and 1” longer head bolts needed on four bottom exhaust bolt holes.
Basic Package Components
Competition 5-angle Valve Job
Intake Valve, 2.300” stainless steel, AFR #7626
Exhaust Valve, 1.880” stainless steel, AFR #7631
1.625” OD Roller Dual Valve Spring with dampner, 250 lbs. on seat, .750” maximum lift, AFR #8031
10º Chrome Moly Retainers, AFR #8510
10º Chrome Moly Valve Locks, AFR #9005
Valve Seals, AFR #6611
Hardened Shims, AFR #8044
Intake Valve Seats, AFR #9062
Exhaust Valve Seats, AFR #9064
Bronze Valve Guides Intake, AFR #9045
Bronze Valve Guides Exhaust, AFR #9046
Guide Plates, AFR #6109
7/16" Exhaust Rocker Stud AFR #6406
7/16" Intake Rocker Stud AFR #6407
All Accessory Holes are Predrilled & Tapped!
Specifications, Features, and Supporting Components
Head Torque 75 Ft. Lbs.
Intake Port Gasket, 1.775” x 2.500” with 1/2” radius AFR #6856
Exhaust Port Gasket AFR #6858
Head Gasket 4.370 bore, Fel Pro #1027, AFR #6851
4.540 bore, Fel Pro #1017, AFR #6850
Mark V-VI-up to 4.500 Bore Fel-Pro #17048 or #1047
Mark V-VI-4.500 to 4.600 Bore Fel-Pro #17049
Head Bolts & Studs Standard ARP, AFR #6308 & #6307
Head Bolt Washers Manley, AFR #6320
Stud Girdle AFR #6210
Sugg.. Manifold Edelbrock #2907 & #2927, AFR #5500 & #5502
Dart #6200, #6201, #6202 & #6203
Brodix HVH #2000, #2001, #2005 & #2006
Spark Plug Starting Range Champion C59C Autolite 3932
Combustion Chambers 119cc
Spring Pocket can be cut to 1.750, no deeper.
Valve Spacing Standard
Valve Angle 24º/4º Intake, 15º/4º Exhaust
Angle Mill (milling available), 102cc Maximum .009” per cc
Flat Mill (milling available), 114cc Maximum .006” per cc
Note: Milling head deck will affect flow numbers.
This product was added to our catalog on Saturday 08 January, 2005.