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KBDP 3.5" Downpipe for a Duramax!

Eliminates the restrictive OEM factory flare joint
Quick release 3.5" V-band clamp
Removable 3.5" to 4" 90 degree exhaust adapter
CNC Mandrel Bent from 409 stainless steel 3.5" tube
Removes all restrictions found in the crushed original equipment design
Heat wrap included
LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.

Fits: 2005-2010 Chevy GMC Duramax 6.6 LLY LBZ & LMM engines

*Note: Fitment is extremely tight with a 3.5" downpipe.

Worn engine mounts may cause enough flexing for rubbing when accelerating. We will not respond to angry fitment emails if you choose to stuff a 3.5" downpipe on your stock daily driver.

KB Diesel Performance LLC

3.5" Turbo Exhaust Downpipe for 2005-2010 Chevy GMC Duramax 6.6 LLY LBZ LMM

SKU yes, i understand fitment will be tight

Regular price: $305.95

KBDP 3.5" Downpipe for a Duramax!

Eliminates the restrictive OEM factory flare joint
Quick release 3.5" V-band clamp
Removable 3.5" to 4" 90 degree exhaust adapter
CNC Mandrel Bent from 409 stainless steel 3.5" tube
Removes all restrictions found in the crushed original equipment design
Heat wrap included
LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.

Fits: 2005-2010 Chevy GMC Duramax 6.6 LLY LBZ & LMM engines

*Note: Fitment is extremely tight with a 3.5" downpipe.

Worn engine mounts may cause enough flexing for rubbing when accelerating. We will not respond to angry fitment emails if you choose to stuff a 3.5" downpipe on your stock daily driver.

Regular price: $305.95

Fitment: Yes, I understand fitment will be tight No, I did not read fitment info

Product variants

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Product Description

KBDP 3.5" Downpipe for a Duramax!

Eliminates the restrictive OEM factory flare joint
Quick release 3.5" V-band clamp
Removable 3.5" to 4" 90 degree exhaust adapter
CNC Mandrel Bent from 409 stainless steel 3.5" tube
Removes all restrictions found in the crushed original equipment design
Heat wrap included
LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.

Fits: 2005-2010 Chevy GMC Duramax 6.6 LLY LBZ & LMM engines

*Note: Fitment is extremely tight with a 3.5" downpipe.

Worn engine mounts may cause enough flexing for rubbing when accelerating. We will not respond to angry fitment emails if you choose to stuff a 3.5" downpipe on your stock daily driver.