2001-2004 Chev/GMC Duramax Diesel S6000AL Install Series
Removal of stock system:
First using 15mm socket or wrench, remove four (4) nuts at flange located approximately under the passenger side seat. Remove rear exhaust from rubber hangers and remove the system from under the truck.
NOTE: If you have purchased the optional front pipe, Remove the stock front pipe on the truck by removing the exhaust hanger on the transmission using a 13mm socket, then remove the band clamp at the front of the pipe, then remove stock front pipe from the truck. ( Note: the band clamp will be re-used during the installation of your new MBRP system).
Installation of MBRP Inc. Performance Exhaust:
NOTE: Only for those who have purchased the optional front:
Install front exhaust pipe using stock band clamp.
Install steel hanger back on transmission and hook to steel rod welded on pipe.
Standard installation:
Install the slip joint to the stock front pipe. ( Four Bolt Flange )
Install extension pipe into the front pipe (Installation tip: Temporarily hang the muffler and tail pipe in place using the two OEM rubber hangers and measure to the down pipe to determine the length needed) approximately 9―” needs to be cut off for extended cab short bed and 20″ for the regular cab long bed. Crew Cab Long Bed Trucks Require an 18″ extension.
Install muffler over the extension pipe(s) and then install the tailpipe into the muffler from the rear of the truck.
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