Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of...
Mishimoto is proud to release a direct-fit silicone boot kit with DuraCore technology designed specifically for the 6.6L Chevrolet/GMC Duramax.Mishimoto DuraCore technology is the synthetic material...