MBRP 3" Turbo Down Pipe, 2011-2015 Silverado/Sierra 6.6L Duramax - GM8427

Part #: GM8427
  • $249.37
    Unit price per 
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2011-2015 Chev/GMC - 6.6L Duramax 3" Turbo Down Pipe

Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance.

  • Greater Heat Retention
  • 20% Greater Flow Over Stock
  • Richer Diesel Sound
  • Will not Affect Emissions (DPF system or the Urea injection system)
  • Gains of +21 HP and +24 lb/ft Torque
  • Will not work with a 3 bolt flange style connection
  • Not to be sold in California
  • Part Number: GM8427
  • Year: 2011-2015
  • Make: Chevrolet/GMC
  • Model Silverado 2500HD/Silverado 3500HD/Sierra 2500HD/Sierra 3500HD
  • Engine: 6.6L Duramax V8
  • Tubing Size: 3 Inch
  • Series: Armor BLK
  • Material: Black-Coated Aluminized Steel
  • Warranty: 3-year warranty

Material Specs:

Black-Coated Aluminized Steel

Style comes first with this finish. It’s the same material from our aluminized steel, but the tailpipes are coated in a special high-heat black powder-coating giving any vehicle a unique look. These systems come with matching black tips as well


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