MBRP 5" XP Series Downpipe-Back Exhaust System S6020409

See New Part# MBS60200409
Sale Price:
See New Part# MBS60200409
2001-2007 GM 6.6L Duramax (All Crew & Ext. Cabs)
XDP Part Number:
$5 Price Beat Guarantee
XDP - MBRP Authorized Online Retailer XDP is a MBRP Factory Authorized Online Retailer ID# 600207727. We would like you to shop with confidence knowing your purchase is covered by the manufactures warranty.   

The Best Systems Start with the Best Materials

MBRP's XP Series is the performance exhaust of choice for the enthusiast who needs a system that can take anything that the road throws at it. This system's rugged sixteen gauge T409 construction can be counted on to withstand everything from salt to rocks, tar to grime. We have had such success with this line that we back it with a Lifetime Warranty.

Built to Perform
You count on your truck to tow all of your gear to where you want it. With your MBRP performance exhaust you can make that happen with up to18 HP more horsepower and 28 ft/lb more torque. Give your truck more pulling power and much improved throttle response with an MBRP diesel exhaust system. Our systems are so much more efficient, it will be easy to see what your truck can really do.

Minimize Backpressure

The secret to getting more out of your diesel engine is to give it lots of cool, clean air. The only way that you can get fresh air in is to get the hot air out. From the spiral louvered high flow muffler to the fully mandrel bent tubing to minimal bend degree angles, your MBRP performance system gets exhaust out fast. Drop exhaust gas temperature by up to 200ºF and set the stage for all the performance you want. An MBRP performance exhaust system is the starting point to getting the most from cold air intakes, programmers, modules and downloaders.

Easy Installation
MBRP systems are as much fun to install as to drive with on your truck. Bolt-on, no weld design makes installing this on your truck a no hassle one and a half to two hour project. Everything is direct fit to the OEM hangers and you get all the clamps and parts you will need, all in one box, no matter what configuration of truck you have.

Sound & Style

Performance is one thing but at MBRP we believe that appearance and sound is just as important. Every MBRP performance exhaust system has been specifically tuned to get the optimal sound from your pickup. With our MBRP brand etched on the tip and our unmistakable styling, there's no question that you have the hottest exhaust on the road - MBRP.


  • 5" T409 Stainless Steel 
  • Downpipe-Back Exhaust System
  • Lifetime Warranty
  • Rich, Mellow Exhaust Note
  • Off-Road - Removes Cat. Converter
  • Installs With Common Hand Tools
  • Tip Not Included

Application Note: All Crew & Extended Cabs applies to GM 2500HD/3500HD Pickups. This system is not designed for use on Cab & Chassis models.

Mfg. Number:

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

(44 Ratings, 4 Reviews) Average Rating:
What a difference!
Tyler B (PA) 8/6/2015 4:55 PM
Went from the stock 3 inch with muffler to this and what a great addition. Less than an hour install.
Great system!
Tom (Michigan) 12/30/2014 9:24 PM
Order #: 657795A This system is fairly easy to install and looks great on the truck! Sound is deep and throaty. Hardest thing is removing the stock exhaust. Once you get it on there, you won't want to take it off.
Great System!
Zak (Greenfield Center, NY) 2/15/2014 9:42 AM
Awesome system! Well worth the extra money for the stainless system. Installation was a little tough, (Extended Cab Long Box) getting all the pipes lined up and square prior to tightening up the clamps. We had to cut the v-band clamp off the down pipe, so you might want to buy one of those at the same time you buy your exhaust. Overall a great system. Mellow tone while cruising. Throaty and aggressive on power regimen. You won't be disappointed.
Scott Sechler (United States) 12/6/2011 6:20 PM
This system sounds great, does not get annoying when your just cruising along, but has great sound when acceleration. Looks great too, the end has a slight polish to it looks awesome