Grand Rock Powerflow "Big Rig" Dual Stack Kit

Universal - All Makes & Models (Fabrication Required)

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★★★★★ ★★★★★ 8 Reviews

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Powerflow "Big Rig" Aluminized Stack Kit

Easy-to-install kit gives your pick-up that "BIG RIG" look!
Great flow - improved performance.
Functional - Routes exhaust fumes above and away from livestock, car haulers, and cargo where diesel smoke is unwanted.
Select many different exhaust stack styles and lengths to use with this system (stacks not included with kits)

Part Number	Diameter of Stack Hardware	Base Diameter X2	Inlet Diameter
DPU-4SK	4"	4"	4"
DPU-5SK	5"	5"	4"
DPU-6SK	6"	5"	4"
DPU-7SK	7"	5"	4"
DPU-5SK-5I	5"	5"	5"
DPU-6SK-5I	6"	5"	5"
DPU-7SK-5I	7"	5"	5"

NOTE: On ALL Stack Kits that are 6" or 7", order SK, SP or SBH stacks. These are reduced to 5" OD at the bottom.

Kit includes 2 bright stainless unistrap clamps to secure stacks
Quality AccuSeal heavy gauge band clamps included in kits

Everything included except chrome stacks. Down pipes, Mufflers and Intermediate pipe not included with these kits.

Fitment Note: The Grand Rock Stack Plumbing is designed specifically for Grand Rock stack tips and has a 5 ID inlet (where stack attaches). If you are not using Grand Rock stack tips, please use the measurements provided to confirm your stack tip will fit the Grand Rock plumbing.

Product Options

PART NUMBER	PART NUMBER ON CHART BELOW:
DPU-4SK	DPU-4SK
DPU-5SK	DPU-5SK
DPU-6SK	DPU-6SK
DPU-7SK	DPU-7SK
DPU-5SK-5I	DPU-5SK-5I
DPU-6SK-5I	DPU-6SK-5I
DPU-7SK-5I	DPU-7SK-5I

Manufacturer Name Grand Rock Exhaust
Shipping Weight 70.00 lb.
Fuel Type Diesel
Prop 65 WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

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★★★★★ ★★★★★

4.5/5 Stars out of 8 Reviews

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★ ★ 2

whistlejacket (Canada) | September 26th, 2008

Stripping down my new 08 F350- 6.4L Power Stroke. It has been hard to find an exhaust system for my PS and this one looks good and the first one I found with dimentions. I will let you know how it works. Doing the tranny right now then the injectors etc,

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Most Popular Questions

How much fabrication does this kit require? What other parts are needed to install?

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Answer

The fabrication required is not usually needed on the kit, but actually the application in which you’re installing the stacks. All stack piping, heavy gauge band clamps, and your stainless unistrap clamps (to secure the stacks) are included to install the stack kit. Generally there is very little fabrication required. *Stacks are sold separately