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KBDP 3.5" Downpipe for a Duramax with S400 Turbo!

  • For T4 S400 Single Turbos Running a 6" to 7.5" Pedestal.
  • 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
  • 37" of Heavy Woven Heat Sock
  • 2x -52 Hose Clamps
  • LB7, LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.
Fits: 2001-2016 Chevy GMC Duramax 6.6 LB7 LLY LBZ LMM & LML 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" S400 Turbo Exhaust Downpipe for 2001-2016 Chevy GMC Duramax 6.6L LB7-LML

SKU KB-6.6l-0116-S400DP
$349.95

KBDP 3.5" Downpipe for a Duramax with S400 Turbo!

  • For T4 S400 Single Turbos Running a 6" to 7.5" Pedestal.
  • 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
  • 37" of Heavy Woven Heat Sock
  • 2x -52 Hose Clamps
  • LB7, LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.
Fits: 2001-2016 Chevy GMC Duramax 6.6 LB7 LLY LBZ LMM & LML 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.
$349.95
Fitment:

KBDP 3.5" Downpipe for a Duramax with S400 Turbo!

  • For T4 S400 Single Turbos Running a 6" to 7.5" Pedestal.
  • 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
  • 37" of Heavy Woven Heat Sock
  • 2x -52 Hose Clamps
  • LB7, LLY, LBZ and LMM engines require a drivers side transmission dipstick tube.
Fits: 2001-2016 Chevy GMC Duramax 6.6 LB7 LLY LBZ LMM & LML 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.

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Total price$965.80

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