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IMPORTANT: The factory downpipe (2001-2004 LB7 only) does not fit aftermarket manifolds and up-pipes
Additional regulation pressures can be easily obtained by swapping the internal regulator spring
a complete plug & play flash tune for your L5P
DSP5 Physical Switch LML
2001-2004 Duramax LB7 Industrial Injection Injector Return Line Bolt Kit (412604) Bolts IMPORTANT: The factory downpipe (2001-20042001 2004 Duramax LB7 Industrial Injection Injector Return Line Bolt Kit (412604) Industrial Injection is The Leading Distributor, Supplier, And Remanufacturer Of Diesel Fuel Systems, Turbochargers, And Engines. Their experience in fuel injection, turbochargers, & engine components is unmatched. Industrial Injection will always deliver the best products for your light, medium, & heavy duty diesel.