Material Information you must know Silcon rubber (SI) is commonly used in larger displacement engine, for example, Triton engine. It has an excellent performance on heat resistance and oxygen resistance Its working temperature is between -58℉ to 392℉, and has a maximum temperature of 482℉ Fitment: Buick 4.2L L6 256CID: 2004-2005 Rainier Chevrolet 4.2L L6 256CID: 2002-2005 Trailblazer 2002-2005 Trailblazer EXT GMC 4.2L L6 256CID: 2002-2005 Envoy / Envoy XL 2004-2005 Envoy XUV Isuzu 4.2L L6 256CID: 2003-2005 Ascender Oilsmobile 4.2L L6 256CID: 2002-2004 Bravada Saab 4.2L L6 256CID: 2005 9-7x
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