2001-2004.5 GM 6.6L Duramax LB7 Injector Sleeve. Fuel Injector Sleeve is made in the USA manufactured to the highest quality materials for a long life. The sleeve was designed to protect the cylinder head as well as the injector. This is a direct repalcement fuel injector sleeve for the LB7 6.6l Duramax. Comes with new O-rings.
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