Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 399
Part #: MBS6016409

MBRP 4" XP Series Cat-Back Exhaust System S6016409

06-07 GM 6.6L Duramax Reg. Cab
Part #: MBS6016409
★★★★★ ★★★★★ 1 Reviews
Additional Processing Time Required

An Email Will Be Sent With Expected Shipping Date After Purchase

Our Recommendations Compatible Products
Scroll to View More


  • 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.

* Exhaust Tip Optional

Lifetime Warranty

Additional Information

Install Sheet


  • MFG. Number S6016409
  • Manufacturer Name MBRP Inc.
  • Shipping Weight 70.00 lb.
  • Warranty Yes
  • Warranty Info Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
Sounds like a jet!
(Unknown) | October 24th, 2006
I bought the MBRP Stainless catback exhaust from Xtreme shortly after purchase of my 06 Duramax LBZ. I absolutely love the MBRP exhaust. Easy installation and very thorough instructions. From stock, you would never think that this truck would have so much sound potential! I make heads turn and people look in their rear view mirros as I pass by. The sound of the Turbo greatly increases. My EGTs are much lower and you can feel the throttle response is a little greater. I am completely satasfied with this MBRP product and completely satasfied with Xtreme's service and reliability. When I placed my order with Xtreme I ordered the wrong one, called them the next morning and they were more than helpful!Thanks Xtreme and MBRP!-Andy from Manheim, Pennsylvania.

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)
No Questions asked yet!