Michigan Motorsports LS Gen 4 Coolant Crossover O-Ring Set | Replaces GM #12602541 | Fits 4.8L 5.3L 6.0L 6.2L LS Engines | Steam Tube Seal Kit

Ensure proper cooling system sealing with the Michigan Motorsports LS Gen 4 Coolant Crossover Steam Tube O-Ring Set, designed like GM #12602541. This complete set of four O-rings is engineered for LS Gen 4 engines using recessed steam port seals, providing secure fitment for coolant crossover tubes and blockoff plates. Correct steam port sealing supports consistent coolant circulation and stable engine operating temperatures. Manufactured from heat-resistant materials for durability, this kit is ideal for cooling system service, cylinder head work, and LS swap builds requiring reliable steam tube sealing.

• Complete Set of 4 Steam Port O-Rings – Designed like GM #12602541, this kit includes four properly shaped O-rings for LS Gen 4 coolant crossover steam tubes and blockoff ports, ensuring secure installation and correct sealing during reassembly.
• Fits LS Gen 4 Recessed Steam Port Applications – Compatible with 4.8L, 5.3L, 6.0L, and 6.2L LS engines that utilize recessed O-ring style coolant crossover seals instead of early flat gasket configurations.
• Maintains Proper Cooling System Sealing – Ensures correct steam port sealing to support stable coolant circulation, consistent engine operating temperature, and proper pressure retention within the cooling system.
• OEM-Style Fitment & Heat-Resistant Material – Manufactured from high-quality materials engineered to withstand coolant exposure, heat cycles, and engine bay conditions while maintaining long-term sealing integrity.
• Ideal for Cooling System Service & LS Swaps – Perfect for steam tube removal, cylinder head service, coolant crossover replacement, or LS engine swaps where correct steam port sealing is essential for system performance.