AFR Cylinder Head 23 SB CHEVROLET 195cc LT4 Reverse Cool Competition Pa 1039
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Notes: Cylinder Head 23 SB CHEVROLET 195cc LT4 Reverse Cool Competition Package Heads (Specify chamber size 55cc 65cc) L98 angle plug Assembled Pair
The Ultimate Bolt-on Emissions Legal Street Weapon The AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 195cc intake port LT4 small block Chevy aluminum cylinder heads are available in an LT4 angle plug version. These heads feature a 55cc to 65cc combustion chamber with a 64cc exhaust port and a 3/4 thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm 2.020 intake and 1.600 exhaust with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of 2500 rpm to 6500 rpm (higher rpm ranges possible depending on combination of parts), 23 valve angle, and standard valve spacing make this the perfect street head for 350 cid to 383 cid engines. Designed specifically for 1996 Corvettes or LT4 manifold users. Center bolt valve cover is available as a machine option. Exhaust port and bolt pattern are raised 3/32 over GM L98 cylinder heads, this rarely affects header or chassis fitment. Note: Hydraulic roller cams typically experience valve float at 6200-6400 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8605, with higher spring pressures to reduce chances of valve float associated with rpm 6200 or higher.