MBRP 4" Aluminized Front Pipe GMAL401

2001-2005 GM 6.6L Duramax
MBRP Performance Exhaust
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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.   

Get even more exhaust flow with this 4" MBRP Front Pipe w/ Flange.

MBRP Front Pipes are jig manufactured to ensure total accuracy. Smooth mandrel bends will give you the best flowing Duramax Front Pipes in the industry. Gain extra power and enjoy the EGT reduction as well. Constructed from heavy duty aluminized steel you can count on this pipe lasting for years to come.

  • 4" Aluminized Steel Construction
  • Increase Power & Efficiency
  • Lower Exhaust Gas Temperatures
  • Mandrel Bent & Jig Manufactured
  • 3 Year Warranty

Will work on but is not recommended for the 04.5-05 Duramax LLY with out the use of aftermarket tuning to eliminate EGR codes.

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(14 Ratings, 2 Reviews) Average Rating:
Lewis (Shelton) 9/17/2012 5:16 PM
I purchased this a few weeks ago and have had it on since. It made a big difference in power and sound. The turbo whistle is quite a bit louder. The fit was really good. Came with new hardware and a gasket. Love it, now I just need to change out my 4 inch Flo-Pro with muffler for a MBRP 5 inch straight pipe.
best investment ever
Anonymous (Unknown) 8/23/2007 2:55 AM
Guys i just got my pipe today and put it on.. all i can say is wow with my boost controller and other mods that turbo whisles now. this is probably the best thing i have put on my truck yet.