OEM Fits are Direct Replacement.
Strict control standards to Build and test
This kits including a aluminum water neck and 160° thermostat. They also include mounting bolts for easy installation. This kit comes with a 45° swivel style water neck and is designed to fit LS engines with a separate thermostat and water neck housing.
Aluminum water neck with 45° swivel
Compatible with Chevy small block LS engines LS1 LS2 LS7
Water Neck Material: Aluminum
Water Neck Finish: Black
Water Neck Style: 45°
Water Neck Sealing Style: O-Ring (not included)
Water Neck Swivel: Yes
Water Neck Heater Bypass: No
Thermostat Rating: 160°
Thermostat Flow: High-Flow
Thermostat Material: Copper/Brass
Water Neck Mounting Hardware: Included

Fit
1997-08 LS Engines Using 2004-08 thermostat
LS Engine Swivel Water Neck
LS1 - LS2 4.8 5.3 6.0 5.7
LS Engine Thermostat
LS2 - LS3 - LS7 4.8 5.3 6.0 6.2
Compatible with Chevrolet Small Block V8 Gen. Iii/Iv (Ls-Based)

Features：
Easy install
Simple operation

Package Include:
Water Neck Housing W/ Thermostat Kit
1 x Water Neck Housing
1 x Flange
1 x Thermostat
2 x Sealing Ring
2 x Screw