Afr 215cc Lsx Cylinder Heads, 65cc Chambers, With Parts

AFR's 215cc LSX heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for moderate street or street/strip builds with displacements up to 408 cubic inches, operating up to 6500 RPM. Requires minimum 3.900 bore size for intake valve clearance. Component upgrade and machining options are available to customize AFR Heads to your specific build.
The Medium Port, High Velocity Torque Monster!
In keeping up with the GM's trend of larger bore sizes and increased displacement, AFR is proud to release the 215cc LS1/LS2/LS6 version of our popular Gen III product line which is aimed specifically to maximize 4” bore combinations (364 - 408 CID). However this head is very versatile and could also be considered for aggressive 346 applications and should also be a prime consideration in larger stroker motors as well (415 - 430 CID) if the focus of the build is more aimed at enhancing street performance than all out strip performance (where our 230 or 245 cc offerings potentially make more sense). This is a very effective design offering serious velocity while still being able to provide a significant volume of airflow, enough to generate well over 600 HP at the crank. This head will also work well on any forced induction or nitrous applications from 346 - 408 CID; larger engines should look to our 230 offering. It of course comes equipped with AFR's trademark 3/4” thick deck and thicker port and combustion chamber surfaces as well. If you're looking to see that blue oval in your rear view mirror instead of your windshield, look no further than the AFR 215.

Note: Hydraulic roller cams in "LS" Gen III engines typically experience valve float at 6600-6800 RPM's. If you are using aftermarket rocker arms valve float will become prominent and AFR highly recommends upgrading to the AFR part #8019 spring. If you plan on running over .600 gross valve lift and/or 6600 RPM, AFR suggests you upgrade your springs to AFR part #8019. The upgraded springs have higher seat and open pressures (155/410+) to better reduce the risk of valve float in more aggressive applications.
Note: The AFR 215 requires a minimum head gasket bore of 4.135 regardless of bore size and is a direct bolt on requiring no special parts.
Note: LSX bead locks and aftermarket bead locks are not interchangeable. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX.
Basic Package Components Part # 100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job   8mm Bead Lock Intake Valve, 2.020” x 4.900" Overall Valve Length AFR #7207 8mm Bead Lock Exhaust Valve, 1.600” x 4.900" Overall Valve Length AFR #7228 PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 AFR #8017 LSX bead locks and aftermarket bead locks are not interchangeable. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX. *Notes 7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D AFR #8512 7° Bead Lock Valve Keepers AFR #9007 Viton Valve Seals .600" O.D x .495" I.D AFR #6612 Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D AFR #8042 Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep AFR #9059 Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep AFR #9069 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L AFR #9051
Specifications, Features, and Optional Supporting Components Head Torque 11mm ARP 70ft. lbs. w/ Moly Head Torque 8mm 23ft. lbs. w/ Moly Exhaust Port Gasket GM#12558573 Head Studs (04+) AFR #6335 Head Gasket, Cometic 4.125 .040" AFR #6848 Head Bolts (97-03) AFR #6330 Head Studs (97-03) AFR #6331 Head Bolts (04+) AFR #6334 Suggested Manifold FAST 90mm, 92mm, or 102mm Intake Port Volume 215cc Exhaust Port Volume 85cc Combustion Chambers 65cc Spring Pocket 1.510" O.D to 1.525" O.D  Head Bolt Washers, Manley AFR #6320 Rocker Arms Stock Valve Angle 15° Flat Mill (Milling options available) .006" per cc 58cc Max Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers.