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MBRP XP Series 409 Stainless Steel 4" Single Exhaust System (Cat.-Back) S6012409

List Price: $597.90
Our Price: $441.92
You Save: $155.98 (26 %)
Manufacturer: MBRP Inc,
Item Number: MBS6012409

Application: 06-07 GM 6.6L Duramax 2500/3500

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.   

Buy Now and receive a MBRP T5051 mirror polished stainless steel angled cut exhaust tip(s) FREE!

Free MBRP Exhaust Tip


  • 4" Mandrel bent tubing for maximum flow
  • Increased Towing Capabilities
  • Direct Fit Design
  • Cat.-Back System

The Duramax has a refined toughness to it. MBRP Inc has left the refined part to General Motors, and added extra toughness. The Duramax makes big power gains with this high flow 4" mandrel bent exhaust system. Each system is a direct bolt on application and is manufactured as a full 4" system all the way to the 5" diameter exhaust tip. Lower EGT (exhaust gas temperature), improved fuel economy along with more towing power are just some of the added benefits of having this system installed on the Duramax.

Lifetime Warranty

Additional Information

Install Sheet

Regular Cab's Require Adapter Pipe Below.

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Product Reviews

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(5 Ratings, 2 Reviews) Average Rating:
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flow and go
TedsLilly (Unknown) 10/4/2006 8:34 AM
easy install and no welding! my truck sounds awesome and no drone. thinking about the front pipe, we'll see once edge gets here
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petesaxis
Anonymous (Unknown) 7/17/2008 12:03 PM
Just finished installing the cat back system and it was very smooth. Be sure to compare the hanger position on the OEM exhaust to make sure you have the right sequence on the new system. Truck sounds great but I bought it for towing economy and we are going on a 2,500 mile trip with our 13,000 pound RV trailer, so the jury is still out. I'll let you know.