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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 mount a set of stacks to your existing 4" or 5" exhaust system. Don't worry if you're running a factory 3" or 3.5" system, as you can hook up to these systems, you'll just need to purchase the kit designed for a 4" exhaust, and then purchase an appropriate exhaust adapter. 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 tell us what size exhaust you'll be hooking it to, 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, and all of the mounting hardware.
IMPORTANT NOTE: Some applications may not allow fitment of stacks due to emissions components in the exhaust. You must determine that you have adequate space to install this system that will not interfere with your current exhaust configuration. If you have any questions, please contact us.
- ManufacturerGrand Rock
- MPNDPU-4SK | DPU-5SK | DPU-6SK | DPU-7SK
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I would like to know if I could get muffler inserts for this system, or would I have to move my muffle more upwards towards the cab to fit this product, I'm really intrested in the Aussie style on a 2004 powerstroke 4 door right foot bed with one muffler and no cats? But I need to know if I need to get inserts or if the muffler can be moved foward some. Thank you?
I don't have any muffler inserts that are that short unfortunately. You would have to move a single muffler up under the truck.
I haul quite a few items in the bed, to include a camper, do you have stacks to go on the outside of the bed. I also have a 95 1ton dw and want one for the out side infront of he two rear tires. Scott?
I don't have exhaust for either of those applications unfortunately. You would have to get custom exhaust done to accomplish what your looking to do.
Is this available in black? Would really rather have black as chrome will pit and rust easily in high heat conditions. Thanks!?
These are only offered in stainless steel, we do not see any rust or corrosion issues.
I am wanting to go with the 5"" straights. Can you tell me how high they are over the top of the cab. I drive a 2006 F350 Superduty dually. I'm wanting them to be about 10-12"" above the top of the cab.?
They are going to be just level with the top of the cab, standard size for those stack kits is 36 inch tall stacks.
I have a Dodge 3500 i need the kit 10' How much is it??
Please shoot one of our techs a call, 888-993-4373
Do you have Spanish speakers??
Are these legal in CA??
No they are not.
I have 99 dodge 3500 2wd dually with afe 5 inch wanting to get your aussie 6 inch wondering if you stacks will work. Also how high will the stacks be.?
These are a generic 36"" length. This kit would work yes.