TSP PRC 312cc CNC Ported LT4 Style 6-Bolt Heads PAIR - AssembledTSP PRC 312cc CNC Ported LT4 Style Cylinder 6 Bolt Heads PAIR w TSP . 660" Spring Kit and Titanium Retainers Precision Race Components (PRC) LT4 CNC 312cc ported cylinder heads. All new 6 bolt Precision Race Components LT cylinder heads! Extensive CNC and dyno testing has resulted in one of the most powerful LT based cylinder heads available! MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE USA!! Features: 2. 165" Titanium Intake Valves 1. 600"

NOTE: 2014-2019 Corvette Base uses the wet sump oil system

Without it

1992-1999 Chevrolet Tahoe/Yukon/Suburban (4 Door Only)

Verify your control arm construction before purchasing

No Oil Pump Clearancing Required

618" Duration 220/23X Lobe Separation Angle 113

delivering more average torque and horsepower under the curve—perfect for trucks that need strong midrange performance & enhanced towing capability

2004-2005 Holden VZ LS1 vehicles

5/8” diameter fuel passage provides the flow capacity for high horsepower applications

It ships with a set of ‚tall‚ removeable velocity stacks

Note: These brackets are ONLY compatible with Holley EFI fuel rail part number 534-209 and 534-210

Perfect for OEM replacement or LT engine swaps