MBRP 3 In. Downpipe for 2015-2016 Chevy/GMC 6.6L Duramax
679-GMCA428

Duramax
Specifications:
While the search to increase Duramax LLY/LBZ/LMM power usually leads to exhaust, intake, or tuner, one part that's often overlooked is the stock turbo downpipe. MBRP's downpipes replace this restrictive factory exhaust component with a direct-replacement that mounts between the factory turbo and the rest of the exhaust. These downpipes delivers more flow, fuel economy, and better performance output.
Features:Does MBRP GMCA428 fit your vehicle?
2016 GMC SAVANA 3500
- Liter: 6.6
- SubModel: LS
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: L
2015 CHEVROLET SILVERADO 3500 HD
- Liter: 6.6
- SubModel: WT
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2; 4.5 in. OD Tip
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2016 GMC SIERRA 3500 HD
- Liter: 6.6
- SubModel: BASE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2015 GMC SIERRA 3500 HD
- Liter: 6.6
- SubModel: BASE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2016 GMC SIERRA 3500 HD
- Liter: 6.6
- SubModel: SLE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2015 CHEVROLET SILVERADO 3500 HD
- Liter: 6.6
- SubModel: LTZ
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Diameter; 3 Bolt Flange; 4.5 in. Outlet Diameter Tip;CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2016 GMC SAVANA 3500
- Liter: 6.6
- SubModel: BASE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Diameter; 3 Bolt Flange; 4.5 in. Outlet Diameter Tip;CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: L
2016 GMC SIERRA 2500 HD
- Liter: 6.6
- SubModel: SLE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2016 CHEVROLET SILVERADO 3500 HD
- Liter: 6.6
- SubModel: HIGH COUNTRY
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2016 GMC SIERRA 3500 HD
- Liter: 6.6
- SubModel: DENALI
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Diameter; 3 Bolt Flange; 4.5 in. Outlet Diameter Tip;CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
2015 CHEVROLET EXPRESS 3500
- Liter: 6.6
- SubModel: BASE
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: L
2015 CHEVROLET SILVERADO 2500 HD
- Liter: 6.6
- SubModel: LT
- Aspiration: TURBOCHARGED
- Fitment Notes: 3 in. Dia.; 3 Bolt Flange; CARB E.O. D-763-2
- CUI: 403
- Engine Type: V8 ( 6.6L / 403 )
- Engine Vin: 8
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