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There's no doubting the big rig sound a set of stacks produce, and Grand Rock has been building both big rig, as well as pickup, stack kits for years. We've put together these kits that will include all of the correct hardware to include everything from your turbo direct pipe all the way to a set of stacks in the bed of your Duramax. You can select from any of the five available stack styles, as shown below, as well as choose what diameter stack you're after. Some stacks (Aussie and Bullhorn) are not available in 4", but all other styles will be available in sizes 4", 5", 6", and 7" diameters.
Kits designed for 4" stacks will include a 4" bed kit (T-Pipe), while all other sizes will include a 5" bed kit. Each of the 5" bed kits are even specific as to whether they will mount to a 5", 6", or 7" stack due to their varying clamp sizes to mount the stack to the inside bed rail. This kind of attention to detail is what separates Grand Rock apart from the rest.
All you need to do is determine what size and style of stacks you're after, and we'll make sure you get all of the parts to mount it up. Kit includes complete bed kit/T-Pipe, pair of stacks, complete 4" straight pipe exhaust from the turbo direct pipe to the bed kit, and all of the mounting hardware.
- ManufacturerGrand Rock
- MPNGM-0004-4SK | GM-0004-5SK | GM-0004-6SK | GM-0004-7SK
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