Grand Rock Exhaust

More About Grand Rock

The Grand Rock PowerFlow Diesel Pickup stacks bring big rig-style stack kits patterned after traditional tractor-trailer stacks to todays popular GM Duramax, Ford Powerstroke and Dodge Cummins diesel pickup trucks. They fabricate their 4" and 5 stacks from 16 gauge cold rolled steel, and the 6 and 7 and the brand new 8 stacks are fabricated from 14 gauge cold rolled steel.

After fabrication, most PowerFlow stacks are given a high quality commercial grade durable triple-chrome-plating, although some customers choose to finish the tips themselves and order the stacks without a finish so they can do a custom treatment or coating.

Grand Rock Exhaust offers their “Universal” exhaust systems in with dual and single exhaust tips. The Universal stack kits are designed to work with any 4 inch diameter exhaust system, and for most pre-DPF (Diesel Particulate Filter) diesel trucks are considered a “catalytic converter-back” stack kit. If your existing exhaust system is smaller than 4 inches you can add an optional reducer. If you have a 5 inch aftermarket exhaust system, you obviously don’t want to go back down to a 4 inch setup, so Grand Rock makes kits that will fit onto your 5 inch diameter exhaust. Grand Rock Exhaust also makes complete turbo-back dual and single tip stack kits for the majority of pre-DPF diesel pickup trucks.

All Grand Rock Exhaust Stack kits are complete and include all the hardware you’ll need for a clean professional installation. PowerFlow Dual Stack Kits are a true 5" diameter from cat to stack exhaust system, with a 5" diameter hole through the bed required. These kits were designed as a “No Muffler” exhaust system and feature AccuSeal clamps for superior joint sealing. All stacks are 36" in length and feature high quality chrome plating. If you want stacks in a different length just ask – we offer stacks in lengths up to 60". Chromed rain caps & stack shields are also sold separately. Grand Rock products are 100% built in the USA and come with a one-year warranty.

Check out some Grand Rock Exhaust Stack customer reviews….

“Hi this is John I just bought exhaust stacks from you guys and I love it, every where I go people look and ask me about it, I like the sound of it. thank you so much I’m sure I will buy stuff for my Dodge truck from you guys in the future. Parleys Diesel Performance is the best! Thanks guys keep up the GREAT Work!” John from Florida

“Hey guys just wanted to let you know what a lifesaver the stacks I ordered are. The track officials at our local 1/8th mile track were getting sick of me laying smoke down so these stacks have worked perfect to get the smoke up and out of the way. The track officials haven’t bothered me since I put them on, thanks guys.” Richard M. from North Carolina

“I thought I had every accessory known to man on my 6.0L Powerstroke until I saw these! I had to get them, since putting them on I have definitely seen an increase in power and a decrease in EGT’s. You guys ROCK!” Gerald S. from Oklahoma

Please note: Your Grand Rock stack kits will be made-to-order at Grand Rock’s facility in Ohio, so delivery time for your stacks can vary. Most of the time, kits ship within a week or two and delivery is via UPS Ground. Shipping this exhaust stack kit outside of the 48 continental United States is quite expensive, but can be arranged. Contact Us for a shipping quote.

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