MBRP
MBRP 15.5-16 GM Duramax 6.6L 3in Down Pipe Kit
SKU: M006 GM8428
Description
Part #: GM8428
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.
Features:
- Direct Replacement. 20% Increased Flow Over Stock. Richer Diesel Sound.
Armor BLK Turbocharger Down Pipe | 3 in. | Black Coated | For Use w/3 Bolt Flange Style Connection | 4 in. Outlet Diameter Tip
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | MBRP |
| Part Number | M006 GM8428 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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