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MBRP GM8424

Downpipe 2004.5-2009 GM 6.6L Duramax LLY/LBZ/LMM

MBRP GM8424

679-GM8424

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MBRP GM8424 Downpipe 2004.5-2009 GM 6.6L Duramax LLY/LBZ/LMM $119.99
Downpipe
  • 2004.5-2010 GM 6.6L Duramax LLY/LBZ/LMM
  • 3"
  • Black Finish

  • Specifications:

    Manufacturer's Part Number:
    GM8424

    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:
  • Mandrel-Bent 16-Gauge Tubing with High-Temp Black Ceramic Coating.
  • 20% Greater Exhaust Flow Over Stock.
  • Lower Exhaust Gas Temperature.
  • Quicker Throttle Response.
  • Greater Heat Retention.
  • Richer Diesel Sound.

  • Does MBRP GM8424 fit your vehicle?

    Narrow Results

    2007 GMC SIERRA 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SL
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 GMC SIERRA 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SLT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2010 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC LT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: BASE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2010 GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2010 GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2006 CHEVROLET SILVERADO 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SLT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2010 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: LT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: WT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: WT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC LT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2009 CHEVROLET SILVERADO 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2006 GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: SL
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SL
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 GMC SIERRA 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: LTZ
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005 GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 CHEVROLET SILVERADO 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: LT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2010 GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: BASE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 CHEVROLET SILVERADO 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: LTZ
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005 GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 CHEVROLET SILVERADO 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: LT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005 CHEVROLET SILVERADO 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004 GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On or After 7/1/04
    • Liter: 6.6
    • Aspiration: T
    • SubModel: BASE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 GMC SIERRA 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 CHEVROLET SILVERADO 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2006 GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SL
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005-2006 GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 2500 HD CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007 CHEVROLET SILVERADO 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: CLASSIC LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2005 CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007-2010 GMC SIERRA 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )
    GM8424 - MBRP Diesel Exhaust Downpipes For GM Duramax is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Works great! Surprising how much it helped. I have a 4" exhaust on my 04 GMC LLY, it was loud enough I had to shut it off to hear or be heard at a drive thru. No more! This actually quieted it down, until I hit the throttle and then it sounds so good! Helped my mileage noticeably as well as the performance. Well worth the money. Installation wasn't too bad. Fit and finish are very good. I have a 50 hp/ 100 tq tune that I now realize I wasn't getting the full benefit of. Now for the intake elbow and a cold air kit.....
    Date published: 2017-05-01
    • y_2017, m_12, d_15, h_24
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_1269431, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
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