2015.5-2016 Duramax LML 3" Turbo Downpipe (GM8428)
2015.5-2016 Duramax LML 3" Turbo Downpipe (GM8428) is backordered and will ship as soon as it is back in stock.
Shipping & delivery
Usually ships in 2–3 business days unless a different lead time is shown on this page. Shipping cost is calculated at checkout (UPS or USPS to the contiguous U.S.).
Shipping policy · Returns · Fitment questions? (561) 207-7988
Delivery and Shipping
Delivery and Shipping
Standard order processing is 2–3 business days unless this product or your order confirmation states a different lead time. Custom-built, made-to-order, backorder, and pre-order items follow their stated lead times.
Enclosures and subwoofer boxes ship for $50 per unit. Other shipping charges are calculated at checkout. Orders outside the contiguous 48 United States may require additional shipping; we will contact you for approval before shipment.
Subwoofer boxes ship UPS Ground where available. Read our Shipping Policy and Return and Refund Policy for delivery, product-specific return windows, and warranty details.
2015.5-2016 Duramax LML 3" Turbo Downpipe (GM8428)
2015.5-2016 Duramax LML 3" Turbo Downpipe (GM8428) is backordered and will ship as soon as it is back in stock.
Description
Description
The MBRP GM8428 3" Downpipe helps your 2015-2016 6.6L LML breath by increasing the exhaust flow off your turbocharger. Removing the restrictions caused by your OEM downpipe - the MBRP replacement will lower your 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.
- 3" Turbo Downpipe
- Aluminized
FITS
- 2011 - 2015 GMC Duramax 6.6L | LMM
Fitment & installation
Fitment & installation
Check the selected part against your vehicle. Need help? Call (561) 207-7988.
Selected part: GM8428
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Read FOX’s application notes for part 987-24-001 (rear shock)
Payment & Security
Payment methods
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