EngineQuest has introduced new replacement cylinder heads for the Chevy 305 engine. Given the proven performance of the EngineQuest (EQ) Chevy Vortec '96-'02 head (EQ Part #CH350C), EQ has expanded on this version to other 305 applications. Made from the highest grade cast iron, the 305 is available in two versions. The performance head includes a 1.94 inch intake valve (EQ Part #CH305A) for 1996 to 2000 GM Vortec engines. The OEM/stock version (EQ Part #CH305B) is for 1996 to 2000 GM truck, van and marine applications and comes standard with a 1.84 inch intake valve. Utilizing flow cast technology, these high performance cylinder heads improve on the original design with a thicker deck for added strength, Dura-Bond exhaust seats for greater resistance to cracking, and a redesigned water flow system for improved thermal conductivity. With CNC machined guides and seats, a superior port finish for increased flow and a three angle valve finish, EQ's cylinder heads offer the best of both worlds  OE fit and improved performance.