The Ultimate Bolt-On Emission Legal Street/Strip Weapon! - Information below is referring to fully assembled heads.
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 |
| 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 |
