Precision Race Components Aftermarket LT4 CNC Cylinder Heads

Precision Race Components LT4 CNC 312cc ported cylinder heads. All new 6-bolt Precision Race Components LT cylinder heads! MADE in the USA!! CAST in the USA!! MACHINED in the USA!! Click Here to SEE why we build better heads! 2.165" Titanium Intake Valves/ 1.600" Stainless Steel Exhaust Valves TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers 6-Bolt Cylinder Heads with Thicker Deck Surface CHE Bronze Guides Will Work on Both Standard GM 4-Bolt & Aftermarket LT 6-Bolt Style Engine Blocks Completely Assembled in the USA Extensive CNC and dyno testing has resulted in one of the most powerful LT-based cylinder heads available! Cylinder Head Specs: Intake CC: 312cc Intake Valve: 2.165" Exhaust Valve:1.600" Chamber Size: 62.5cc