If you're looking for a high-quality silicone coupling that can withstand extreme temperatures and resist fuel, oil and chemicals, the PPE 115900500 Silicone Coupling is the perfect choice. This durable coupling is made of 5 plies of polyester reinforced fibers, with a fluorocarbon lining that offers superior lubricity. It can withstand constant boost pressures from -76 degrees to +437 degrees Fahrenheit, making it ideal for a wide range of applications. Plus, it's UV and Ozone resistant for long-term use. Trust the PPE 115900500 Silicone Coupling for all your high-performance needs.  Replaces GM Part Number 15188715