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Customer Service

  • Mon - Fri: 8 a.m. - 6 p.m. ET
  • Sat - Sun: Closed


  • Mon - Sat: 8 a.m. - 11 p.m. ET
  • Sun: 9 a.m. - 5 p.m. ET

MBRP Turbo Down Pipe GMCA425

Product Information
List Price:
Our Price:
Part #:
3" Turbo Down Pipe - 50 State Legal
  • 50 state legal
  • EO # D-763-1


  • Allows for up to 20% greater flow over stock
  • Allows turbo to spool up quicker, increasing throttle response
  • Designed to maintain a safe EGTs
  • Custom designed for each make and model of truck
  • Creates a richer exhaust note
  • Greater heat retention
  • Bolt on installation using factory mounting points
  • Available in T-409 stainless steel and aluminized steel
  • Stainless pipes are backed by a lifetime warranty, and aluminized are backed by a three year warranty

Some people are just never satisfied - they always feel the need to be tinkering and trying new things. The folks at MBRP understand this and now they are going to feed your addiction. Whether you drive a Cummins, Duramax, or Powerstroke; MBRP gives you the option to tune your exhaust to your own personal preference.

MBRP offers one of the deepest selections of turbo downpipes on the market. MBRP downpipes offer up to a 20% increase in exhaust flow, which will increase engine performance and power gains. All MBRP downpipes are designed for your exact truck, which will help to maintain safe EGTs. MBRP turbo downpipes are constructed of stainless steel or aluminized steel. Stainless downpipes are backed by a lifetime warranty, while aluminized pipes are backed by three warranty.

If you ready to increase your diesel truck's performance, a quick and easy upgrade is a turbo downpipes from MBRP. Order yours today!

View Available Part Numbers For This Product Line

California Residents: Prop 65 Warning


  • 2001-2003 Chevy Silverado 2500, 6.6L V8 Duramax
  • (2004) Chevy Silverado 2500 LB7, 6.6L V8 Duramax
  • 2001-2003 Chevy Silverado 3500, 6.6L V8 Duramax
  • (2004) Chevy Silverado 3500 LB7, 6.6L V8 Duramax
  • 2001-2003 GMC Sierra 2500, 6.6L V8 Duramax
  • (2004) GMC Sierra 2500 LB7, 6.6L V8 Duramax
  • 2001-2003 GMC Sierra 3500, 6.6L V8 Duramax
  • (2004) GMC Sierra 3500 LB7, 6.6L V8 Duramax


Limited Lifetime SS / 3 Years Black / 3 Years Aluminized Steel / 1 Year on Ceramic Coating

409 stainless steel systems - limited lifetime warranty

Aluminized steel systems - Three (3) years

Black ceramic coated aluminized steel systems - Three (3) years for the components and One (1) year for the ceramic coating

Remember: You MUST send your warranty card and a proof of purchase to MBRP to activate your warranty. All warranties are from the date of purchase


MBRP turbo downpipes are specifically designed for your diesel engine, meaning that installation is a bolt-on, no modification affair. If you have any questions, give our helpful customer service team a call at 877-216-5446.

PDF Icon MBRP GMCA425 Installation Instructions