Engine Coolant Air Bleed Pipe for Cadillac Escalade/Chevrolet Silverado/GMC Sierra 1999-2007 - OE Replace 626-543 12559091 Replacement, Corrosion-Resistant Coolant Exhaust Pip

Designed for heavy-duty thermal cycling, our coolant crossover pipe is the ultimate solution for compatible GM 4.8L/5.3L/6.0L Vortec engines. Its aircraft-grade aluminum construction eliminates plastic fatigue failures common in original exhaust pipes, ensuring consistent coolant circulation between the cylinder head and radiator.

• Precision-Engineered Coolant Crossover Pipe Replaces OE Replace 12604711, 12559091, 12581215 ，626-543 – This coolant exhaust pipe is suitable Compatible with 2002-2006 Chevrolet Avalanche 5.3L; for2003-2007 Chevrolet Express 4.8L, 5.3L, 6.0L for2004 Chevrolet SSR 5.3L for1999-2007 Chevrolet Silverado 4.8L, 5.3L, 6.0L for2000-2006 Chevrolet Suburban 5.3L, 6.0L for2000-2006 Chevrolet Tahoe 4.8L, 5.3L for2003-2004 Chevrolet Trailblazer 5.3L for 2003-2004 GMC Envoy 5.3L for 2003-2007 GMC Savana 4.8L, 5.3L, 6.0L for 1999-2007 GMC Sierra 4.8L, 5.3L, 6.0 for 2000-2006 GMC Yukon 4.8L, 5.3L, 6.0L for 2003-2007 Hummer H2 6.0L for 2004 Buick Rainier 5.3L for 2002-2006 Cadillac Escalade 5.3L, 6.0L
• Machined Aluminum Coolant Crossover Pipe with Dual Bleed Ports Balances Coolant Flow, Reduces Engine Bay Temperatures by 18°F , Preventing Overheating in Trucks/SUVs.
• Triple-Layer EPDM Core + Stainless Steel Brackets Withstand 250 PSI Pressure & -40°F to 400°F Extreme Conditions – 5X Longer Lifespan Than Plastic OE Parts.
• Optimized Coolant Exhaust Pipe Design Increases Flow Rate by 22%, Enhancing Fuel Efficiency up to 6%
• Pre-Drilled Bolt Holes & Pre-Assembled Gaskets Make This Coolant Crossover Pipe Swap Effortless