Straub 346-4444 LS Cylinder Head Steam Vent Plumbing Kit

The Straub Technologies 346-4444 LS Cylinder Head Plumbing Base Kit is a complete steam vent and off-gas system designed for GM LS-series engines. This kit vents from the center of each cylinder head to release trapped air and steam, directing flow to the radiator cap or an expansion tank to improve cooling efficiency and maintain proper cooling system pressure.

Key Features:

• Complete 4-corner steam vent system for all Gen III and Gen IV LS engines
• Includes 6 feet of -4 AN black braided stainless steel hose
• All necessary fittings and hardware included for installation
• Vents from center of each cylinder head for optimal air and steam evacuation
• Professional black anodized finish components

Installation Notes:

• Requires drilling and tapping radiator for two 1/8-inch NPT fittings
• If using an expansion tank, mount at the highest point in cooling system
• Ideal for off-road, racing, and high-performance applications where consistent cooling and pressure control are critical

This kit works in conjunction with Straub's modified head gaskets featuring additional cooling holes, helping to eliminate hot spots and improve overall engine cooling performance. The system is engineered to maintain stable operating temperatures under sustained high-RPM loads.

For off-road use only.