Up for sale is an absolute top-tier, turnkey LS7 cylinder head and valvetrain package.
THE ULTIMATE LS2 / LS3 UPGRADE:
If you are running a 4.000" or larger bore engine (LS2, LS3, or aftermarket 4.000" bore block), you know standard factory LS7 heads require a massive 4.125" minimum bore to avoid severe valve shroud and interference. ETP (ET Performance) designed these purpose-built aftermarket castings specifically to fit a 4.000" bore while retaining full LS7 high-flow runner architecture! This allows you to run true LS7 breathing power on standard 4.0" bore short blocks without needing an expensive 4.125"+ bore resleeve or aftermarket block.
PACKAGE OVERVIEW:
ETP LS7 4.0 SIX-BOLT ALUMINUM CYLINDER HEADS
Castings: ETP / ET Performance LS7 4.0 purpose-built aftermarket castings (not ported stock GM heads).
Bore Fitment: Specifically engineered for 4.000" bore blocks (LS2, LS3, etc.).
Block Clamping: 6-bolt layout for extreme clamping force on 6-bolt aftermarket blocks (also compatible with standard 4-bolt blocks).
Head Sealing: Receiver groove machined for top fuel hoops to handle extreme cylinder pressures. (Also works with head gaskets)
Intake Valves: Massive 2.200" Stainless Steel valves.
Exhaust Valves: High-heat 1.600" Inconel valves (essential for heavy nitrous or high boost).
Valve Springs: Premium Ferrea S10076 Dual Valve Springs
540 lb/in spring rate
262 lb @ 2.000" seat pressure
640 lb @ 1.300" open pressure
.750" max lift capability
Retainers: Ultra-lightweight Xceldyne XRE530-LTW Ti-17 titanium retainers.
Locks: 8-degree locks.
Assembly: Fully assembled and ready to install.
T&D SHAFT-MOUNT ROCKER SYSTEM (PART #2350)
Application: Specific to ETP LS7 cylinder heads.
Ratio: 1.7 Ratio.
