The down pipe back type system mounts to the short stock down pipe in Duramax equipped vehicles and eliminates the catalytic converter. The objective is to provide the absolute lowest exhaust gas temperatures, maximum exhaust flow, torque and horsepower possible. The ideal configuration for off road applications.

Fits 2001-2007 - and will fit 07-09 LMM Duramax for Race Applications Only - Hanger on front pipe will be have to be relocated to line up with factory hanger location.  Other modifications may be necessary.