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Exhaust› Exhaust Pipes, Systems and Components

Pacbrake

~(34 lbs. 18X16X10)~ In Line Mount 4 inch PRXB High Performance Exhaust Brake Kit For GMC 06-07 Classic 6.6L Duramax 32 Valve Engine-Allison 1000 Series Automatic Transmission without optional 2nd alternator Pacbrake

$1,661.38 $1,495.24 Save $166.14

SKU: P00S C40070

In Stock
In Stock
Ships by Jun 20
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Pacbrake C40070 is an inline mount 4-inch PRXB exhaust brake kit designed for 2006-2007 Classic 6.6L Duramax 32 Valve engines with Allison 1000 Series Automatic Transmissions. It provides 50% more braking power at lower RPMs (1400-1800 RPM range) and features a spring-controlled, pressure-regulated mechanism to prevent engine overpressure. The unit includes a patented 90-degree non-contacting butterfly valve and Arcor nitride coating for durability. An onboard air kit with a compressor, 0.5-gallon air tank, and 25-foot coiled air hose is included.

Fitment

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Specifications

BrandPacbrake
Part NumberP00S C40070

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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