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HSP Diesel Billet Thermostat Housing Kit For 01 05 6.6L Duramax egr system Constructed to the same specifications FGXX 668603 Constructed to the same specifications as our top of the line Pro Series we back this line with an industry leading 3 Year Warranty A tool that will last a lifetime turbochargers The HSP Diesel Billet Thermostat Housing Kit is engineered to elevate the cooling system performance of 2001 2005 Chevrolet and GMC trucks equipped with the Duramax LB7 and LLY engines
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