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Home > MBRP > Turbo Down Pipes > MBRP 3" Turbo Downpipe GM8427
MBRP 3" Turbo Downpipe GM8427
2011-2015 Duramax LML
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MBRP 3" Turbo Downpipe GM8427

Fits: Chevy/GMC Duramax 6.6L LML
Years: 2011-2015
Part # GM8427
  • Greater Heat Retention
  • 20% Greater Flow Over Stock
  • Richer Diesel Sound
  • Will Not Affect Emissions (DPF or Urea System)
  • Gains of +21HP & +24 Ft-lbs.
  • Installation Instructions pdf
  • Flow Specs pdf
  • 2015 Duramax LML Import Note:
    We have come accross a design issue that affects SOME of the 2015 Duramax truck exhaust fitment. Previously released products for the LML Duramax will fit the 2015 Duramax ONLY if the Turbo Direct Pipe DOES NOT have a 3-bolt flange to connect the catalytic converter.
  • NOTE: This product CAN NOT ship to California due to CARB regulations.
install difficulty
2 Hours
2 Hours
Install Difficulty
difficulty bar
Product Type:Turbo Down
PipePipe Diameter (inch): 3

Looking to add power to your GM Duramax LML? Most look at the exhaust, intake, and programmer for horsepower gains. The factory turbo direct pipe is often overlooked. MBRP has addressed this restrictive component of the factory exhaust with their new turbo direct pipe replacement that mounts between the factory turbo and exhaust system. Featuring 16-gauge mandrel bent tubing for maximum flow & extremely durable high-temperature ceramic coating, these downpipes deepen the sound of your diesel V8 while lowering exhaust gas temperature and quickening throttle response.
dyno chart
The MBRP down pipe provides a smoother flow from the turbo resulting in lower EGT's and increased performance. The down pipe is a relatively easy install due to the precision bends that you’ve come to expect from MBRP.
flow specs
NOTE: This product CAN NOT ship to California due to CARB regulations.
Product Description Price Order
MBRP 3" Turbo Down Pipe
2011 - 2015 GM Duramax LML
Part # GM8427

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