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  • MBRP 11-13 Chev/GMC 6.6L Duramax 3in Turbo Down Pipe Black
  • MBRP 11-13 Chev/GMC 6.6L Duramax 3in Turbo Down Pipe Black
  • MBRP 11-13 Chev/GMC 6.6L Duramax 3in Turbo Down Pipe Black
  • Photo - Primary
MBRP 11-13 Chev/GMC 6.6L Duramax 3in Turbo Down Pipe Black

MBRP 11-13 Chev/GMC 6.6L Duramax 3in Turbo Down Pipe Black

$299.99 $370.58
Part no. GM8427 In stock

Your vehicle

Year, make and model. Our techs check fitment against it before the order ships.

Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of emissions laws in your jurisdiction. Ensure that the intended...

Full details and fitment

The details

About this part

Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of emissions laws in your jurisdiction. Ensure that the intended use of this product is permitted. Not for sale or use in the state of California.

Technical Drawing
Installation Instructions
  • Richer Diesel Tone. Increase Flow of 20% Over Stock, 21HP Gains and 24lb/ft Torque.
  • 20 Percent Greater Flow Over Stock
  • Will Not Affect Emissions
  • Gains Of +21 Horsepower
  • 24 lb./ft./ Torque Gain
  • Greater Heat Retention
  • Richer Diesel Sound