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MBRP GM8427 3 Inch Turbo Downpipe 2011-2015 Duramax 6.6L

(Honda Civic 2016-20; Ford Ranger 1985-94, Explorer 1991-94, Bronco II 1985-90; Toyota Camry 2002-06, Highlander 2001-07, Solara 2002-08 + 13 more models)

Manufacturer

Picture for manufacturer MBRP

Part Number

GM8427
18 reviews
Sale Price

$299.99

In Stock (8)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The MBRP GM8427 is a high-performance 3-inch turbo downpipe engineered specifically for 2011-2015 Chevrolet Silverado and GMC Sierra 2500/3500 trucks equipped with the Duramax 6.6L diesel engine. This downpipe replaces the restrictive factory component to significantly improve exhaust flow, resulting in better turbo spool, increased horsepower, and enhanced throttle response.

Key Features:

  • Mandrel-bent 3-inch aluminized steel construction for maximum exhaust flow
  • Black powder-coated finish for corrosion resistance and aggressive appearance
  • Heavy-gauge tubing ensures durability under demanding conditions
  • Enhanced exhaust tone with deeper, more aggressive sound
  • Direct bolt-on installation with no modifications required
  • Mandrel bending eliminates flow-robbing ripples in the tubing bends

Important Notes:

  • Not compatible with 3-bolt flange style turbo connections
  • Not legal for sale or use in California (not CARB compliant)
  • Black powder coating backed by 1-year warranty; remaining components covered by 3-year warranty

Upgrade your Duramax exhaust system with this performance downpipe that delivers measurable power gains and a commanding exhaust note. Best suited for dry climates with minimal precipitation exposure.

Products specifications

Fits

Honda Civic 2016-20; Ford Ranger 1985-94, Explorer 1991-94, Bronco II 1985-90; Toyota Camry 2002-06, Highlander 2001-07, Solara 2002-08; Chevrolet Silverado 2500 HD 2011-15, Silverado 3500 HD 2011-15; Dodge Ram 2500 1998-2002 + 10 more models

Prop 65

WARNING: This product can expose you to chemicals including nickel (metallic) and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects; or other reproductive harm

Material

Aluminized Steel

Tubing Diameter

3 Inch

Major

Diesel

Minor

Down Pipe

UPS Able

Yes

Bolt-On Yes/No

Yes

Restrictions

Not To Be Sold In California.

Flow Increase (%)

20

Vehicle Segment

Truck

Type

Downpipe

Horsepower Increase (HP)

21

Fuel Type

Diesel

Torque Increase (FTLB)

24

ok, shipping is high though

THANK YOU

No issues

I'm Satisfied

Prompt delivery... brand name quality parts at a very reasonable price.

Great

Good experience

Best price. Looks accredited and secure. Didn't state free shipping then added it later in process. Your shipping cost only 60¢ more than "free" shipping costing $9.95 Thanks.

good

So far so good!

Great price

Easy and safe

I couldn't find this part anywhere! That's until I found Autoplicity! Thanks Guys!

well made website would give 5 stars if i could confirm fast shipping.

Great price on name brand parts. Quick shipping. Will use again for my next order of parts.

My order arrived on time and was priced right

User friendly, no problems hopefully product will be exactly what was ordered!

Best price by far over 100 dollars different from amazon.com. I will definitely shop here agian

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