AFR’s new LS3 Mongoose 260cc cylinder heads are made to flow 384cfm @0.700” of intake lift. Available in a four- or six-bolt configuration these heads are compatible with aftermarket blocks or the factory GM piece. Manufactured using A356 aluminum, these heads feature 3/4” deck thickness, 100 percent CNC ported intake and exhaust runners, plus fully machined combustion chambers. They are also CARB legal (EO D-250-5) for weekend warriors.