LS LS1 Throttle Body Coolant Bypass Hose Kit Cylinder Head Steam Port Crossover

Throttle Body Coolant Bypass Hose Kit for LS LS1

This throttle body coolant bypass hose kit routes coolant away from the throttle body on LS and LS1 engines and includes a cylinder head steam port crossover for a complete install.

Overview

This throttle body coolant bypass hose kit is made for LS and LS1 engine builders who want to keep hot coolant out of the throttle body. The kit pairs bypass hoses with a cylinder head steam port crossover to simplify cooling system routing. It suits swap projects and performance builds where clean plumbing matters.

Built For Performance

• Bypasses the throttle body coolant circuit on LS and LS1 engines
• Includes cylinder head steam port crossover
• Hose and fittings sized for LS-series coolant routing
• Helps reduce heat transfer into the throttle body
• Suits both stock and swap-style intake setups

Fits These Machines

• for GM LS1 equipped vehicles
• for GM LS-series engine swaps

On-The-Job Use

• Engine swap projects using LS or LS1 platforms
• Performance builds focused on intake air temperature
• Cooling system simplification during rebuilds
• Steam port venting on LS cylinder heads

Specs At A Glance

Good To Know

Q: Why bypass the throttle body coolant lines? A: Removing the coolant circuit keeps hot fluid out of the throttle body, which can help lower intake air temperatures.

Q: Is the steam port crossover required? A: The crossover helps vent trapped air from the cylinder heads, so it is commonly used together with the bypass hoses.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.