Replacement 5.3 Liter LT 3.780" Bore - Factory Mast OE Stock Replacement - Direct Injected - OE ValvesFactory Replacement NO CNC Porting Introducing Factory Mast Gen 5 LT Replacement Cylinder Heads. Our team carefully inspects, pressure tests, machines, and qualifies our gently used factory OE heads. We machine and qualify the deck, and all surfaces to better than factory. Great as a factory replacement cylinder head, or for your own porting applications. Full Send, no compromises, no shortcuts, ever. Dimensional Specs Bore Size: 3. 780" (+) Weight:
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