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Vehicle Info NeededMBRPPART NUMBER: 679-GMAL401
Downpipe Kit With Flange 2001-2005 GM Duramax 2500/3500
$21499
Ships on Sep 08, 2026
Lowest Price GuaranteeAluminized Front-Pipes
- Downpipe Kit With Flange
- 2001-2005 GM Duramax 2500/3500
- 4" Aluminized Tubing
MBRP Diesel Exhaust Downpipes For Dodge Cummins are formed from mandrel-bent aluminized or stainless steel tubing and removes the factory restrictions so the turbo can spin freely and move more air. Power, torque and throttle response improve while exhaust temperature drops. OE-quality flanges and factory mounting locations provide a superior fit. Features:
- Aluminized Steel or T409 Stainless Steel.
- 4" Tubing.
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- Increases Horsepower and Torque.
- Direct Fit for Quick Installation.
- Welded Bungs Accept Electronic Leads.
- Lowers EGT's.
- Keeps Truck Legal by Maintaining DPF.
Part TypeTurbocharger Downpipe
Product LineMBRP Diesel Exhaust Downpipes For Dodge Cummins
BrandMBRP
Package Height8.0
Package Width14.0
Package Length48.0
Weight14.0 PG
Part CategoryPerformance Parts
Leg/Straight LengthN/A
Center Line RadiusN/A
PositionFront
Tube Size4 in (101.6 mm)
MaterialAluminized Steel
Part FitmentDirect Fit
Bend AngleN/A
Tube Diameter4 in (101.6 mm)
Gauge16
Vendor Part NumberGMAL401
Package Qty1
Package TypeEA
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