Afr 230cc Lsx Cylinder Heads, 72cc Chambers, With Parts

AFR's 230cc LSX heads feature 100% CNC ported intake, exhaust & 72cc chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for aggressive street or street/strip builds with displacements up to 427 cubic inches, operating up to 6500 RPM. Requires minimum 4.000 bore size for intake valve clearance. Component upgrade and machining options are available to customize AFR Heads to your specific build.
The Ultimate Bolt-On Emission Legal Street/Strip Weapon!
For the maximum high performing street/strip LS1/LS2/LS6 aluminum cylinder heads AFR’s all new 230cc emission legal heads (ARB only, 49 state legal, not California) are hands down the best choice. Specifically designed for 1997 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LSX cylinder head offers unmatched flow performance and features 2.080" intake and 1.600" exhaust valves with AFR’s iron ductile interlocking valve seats. The 230cc cylinder head is ideal for naturally aspirated 396 CI to 427 CI engines. For a wild 346 CI the 230 cc is a good choice, however some low RPM loss of torque might occur. These are available in the Big Bore setup with 62cc or 72cc combustion chambers, and also 65cc chambers in the small bore format. AFR’s LSX is a direct bolt on, no special parts required. Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses and thick wall runners provide unparalled durability. An exclusive new modern combination chamber design with double quench pad area helps the LSX generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further!

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, 2.080" x 4.900" Overall Valve Length AFR #7208 8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length AFR #7228 PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, Max RPM 7000-7200 AFR #8019 *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 Gasket for Large Bore, Cometic 4.125 .040" AFR #6848 Head Gasket, Cometic 3.930 .040" AFR #6846 Head Bolts (97-03), ARP 134-3609 AFR #6330 Head Studs (97-03), ARP 234-4110 AFR #6331 Head Bolts (04+), ARP 134-3610 AFR #6334 Suggested Manifold FAST 90mm, 92mm, or 102mm Intake Port Volume 230cc Exhaust Port Volume 86cc Combustion Chambers 62cc, 65cc or 72cc Spring Pocket 1.510' O.D to 1.525, no deeper  Head Studs (04+), ARP 234-4317 AFR # 6335 Head Bolt Washers, Manley AFR # 6320 Valve Angle 15°Valve Angle Flat Mill (Milling options available) .006" per cc 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.