DP Customs Duramax S400 Downpipe RETRO V8 Upgrade your E41 ECM in

Upgrade your E41 ECM in 20 minutes or less

DPC PTO Covers

These kits utilize our Billet -10 AN Adapter Fittings which give you leak free and easy connections at the firewall and thermostat housing

Optional Stainless Or Black Nylon Finish

With an easily removable base

DP Customs Duramax S400 Downpipe RETRO V8 Upgrade your E41 ECM inDP Customs Duramax S400 Downpipe The DP Customs 3. 5 downpipe will fit 2001 2007 Duramax trucks with a S400 kit using a 6. 5 7 pedestal. Dented near the uppipe, this downpipe can be swung inches for multiple clearance routes. Enjoy a flared 4 v band connection at the bottom for ease of R&R as well as a v band to 4 ID converter to easily remove the assembly from your exhaust system. What's Included Ceracoated Upper Downpipe Ceracoated Lower Downpipe w