DTech DT660021 Injector & Return Line Kit

2001-2004 GM 6.6L Duramax LB7
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The DTech DT660021 Injector & Return Line Kit for your 2001-2004 GM 6.6L Duramax LB7 includes the seals needed to replace 4 injector or one bank on your LB7 engine. Kit includes Injector O-rings, Nozzle Washers and Banjo Washers. Each kit does one bank, 2 kits required per engine for both sides.


  • Direct Fit 
  • 1 Kit Per Side, 2 Req. Per Engine
DTech Warranty:
Consumer/Non-Professional Installers - 1 Year, Unlimited Mileage Warranty. 
Professional Shop / Automotive Truck Installers - 2 Years, Unlimited Mileage Warranty. 

This warranty applies to product used under normal operating conditions and service. Repairs, modification, disassembly or any other alteration of DTech products from their original condition are not covered by this warranty. Warranty will not be extended to failures caused by incorrect installation or application, modification, contamination, negligence or abuse. The warranty does not extend to diagnostic time, incidental or consequential damages.
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