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LSx Cathedral Port Emissions Legal - LSx Cathedral Port Competition - LS3 Rectangular Port




Chevrolet - LSx - Cathedral Port - Emissions Legal
AFR emissions legal (CARB #D-250-4) 210cc LSx heads are the cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust and  chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for street, towing, or street/strip engines with displacements up to 383  cubic inches, operating up to 6300 RPM. Requires minimum 3.900 bore for intake valve clearance. AFR heads are available bare (without parts), call our tech line for details. more info
Chevrolet LSx - Cathedral Port - Competition
AFR max effort cathedral port head for the LSX platform is recommended for race applications or radical Pro Street builds with displacements up to 454 cubic inches, operating at or below 6800 RPM. Requires a minimum bore size of 4.000 to clear the standard 2.165 intake valve. AFR heads are available bare (without parts), call our tech line for details. more info
Chevrolet - LSX - Square Port - Competition
AFR 260cc LS3 “Mongoose” Cylinder Heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head currently available. Featuring A356 aluminum castings, titanium retainers and the highest quality components, throughout, they’re designed for 4.000 or larger bore applications up to 454 CI, operating at up to 7000 RPM. Emissions legal for 2007 to 2016 6.2L LS engines under CARB #D-250-5. more info
Chevrolet - LSx - Cathedral Port - Enforcer Series
AFR 210 Enforcer Cylinder Heads for the LS1 feature Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM. They come fully assembled with the identical components found in higher end CNC ported cylinder heads; including PAC Racing springs, viton valve seals, machined bead valve locks, hardened spring seats and ductile iron seats in addition to one piece 8mm 21-4N stainless steel valves. They are available bare if you prefer to set them up in-house. Sold as a single piece, 2 are required per engine. Please see footnotes for additional information. more info