2004.5-2010 Duramax 3" Downpipe (GM8424)

MBRP Exhausts are designed to fit all wheelbase & cab configurations unless otherwise specified.

The MBRP GM8424 3" Downpipe helps your 2004.5-2010 6.6L LBZ/LBZ/LMM breathe by increasing the exhaust flow that comes off your turbocharger. This system features full 16-gauge mandrel-bent tubing for maximum flow and an extremely high-temperature ceramic coating. By removing the restrictive OEM downpipe and replacing it with a free-flowing MBRP downpipe, you will deepen the sound of your 6.6L, lower EGTs, and increase performance. The install process is as simple as it gets from the precision bending that you'd expect from an MBRP kit!

Part Number: GM8424

• Improved Heat Retention & Dissipation
• Increased Exhaust Flow Over Stock
• Increased Performance
• Throatier Sound
• Faster Spool-Up

• Click Here For Installation Instructions

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• ?

  Does this work with a 4 inch mbrp exhaust

  Yes.

• ?

  Do you need to tune after installing this?

  It's not mandatory.

• ?

  Do you need a tune for the truck after this?

  The need for tuning is situational, but generally, a tune isn't mandatory for just a downpipe upgrade unless you're pairing it with significant other mods.