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MBRP GM8424

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

679-GM8424

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$149.99
MBRP Downpipe 2004.5-2009 GM 6.6L Duramax LLY/LBZ/LMM $149.99
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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

    2004  GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: BASE
    • Engine Vin: 2
    • 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 )

    2004  CHEVROLET SILVERADO 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: BASE
    • 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 )

    2005-2006  GMC SIERRA 3500

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • 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 )

    2005-2006  GMC SIERRA 3500

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

    2004  GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004  CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • 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: LS
    • 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 )

    2004  GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLT
    • Engine Vin: 2
    • 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 )

    2007  CHEVROLET SILVERADO 2500 HD CLASSIC

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

    2007  CHEVROLET SILVERADO 3500 CLASSIC

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

    2004  CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: BASE
    • 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 )

    2005-2010  GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: SLT
    • 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 )

    2004  CHEVROLET SILVERADO 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: WT
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004  CHEVROLET SILVERADO 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: LT
    • 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  CHEVROLET SILVERADO 3500 HD

    • 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 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLE
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007  CHEVROLET SILVERADO 3500 CLASSIC

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

    2007  GMC SIERRA 2500 HD CLASSIC

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

    2004  CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: LT
    • 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 )

    2005-2010  GMC SIERRA 2500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • 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  GMC SIERRA 3500 CLASSIC

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

    2007  GMC SIERRA 2500 HD CLASSIC

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

    2004  GMC SIERRA 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: BASE
    • Engine Vin: 2
    • 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 )

    2005  GMC SIERRA 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 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: WT
    • Engine Vin: 2
    • 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 )

    2007  CHEVROLET SILVERADO 2500 HD CLASSIC

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

    2004  GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: WT
    • Engine Vin: 2
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2004  GMC SIERRA 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • Aspiration: T
    • SubModel: SLE
    • Engine Vin: 2
    • 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 )

    2004  CHEVROLET SILVERADO 2500 HD

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007  CHEVROLET SILVERADO 3500 CLASSIC

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

    2007  GMC SIERRA 3500 CLASSIC

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

    2004  CHEVROLET SILVERADO 3500

    • CC: 6599
    • Fitment_Note: Made On Or After 7/1/2004
    • Liter: 6.6
    • SubModel: LS
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    2007  GMC SIERRA 3500 CLASSIC

    • CC: 6599
    • Liter: 6.6
    • SubModel: 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 )

    2007-2010  GMC SIERRA 3500 HD

    • CC: 6599
    • Liter: 6.6
    • SubModel: WT
    • 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 )

    2007  GMC SIERRA 3500 CLASSIC

    • 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: SLE
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )
    GM8424 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_2019, m_9, d_21, h_6
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.13
    • 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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