Grand Rock Turbo-Back Dual Exhaust Stack Kit for use with 7 Inch Stacks for 2001-2007 GM 6.6L Duramax

Grand Rock introduces their Turbo-Back PowerFlow Dual Stack bed Kit for the 2001-2007 GM 6.6L Duramax. A high performance exhaust system with the “Big Rig” look and style for your truck. Take a big bold step up in looks and performance with a dual exhaust stack kit finished with triple-chrome plated stack tips from the big rig experts at Grand Rock Exhaust.

Whether you’re heading to the drag strip, tractor pulls, dyno event or just cruising Main Street, Your truck needs Stacks! Not just for looks, this turbo-back exhaust stack kit is functional too. You will experience lower exhaust gas temperatures and increased fuel economy all while routing exhaust fumes above and away from livestock, car haulers, and cargo where smoke is unwanted.

Key Features:

• Maximum Exhaust Flow! Pull that hot air away from your engine.
• Increased Fuel Mileage! Smile each time you fill Up!
• Extra Horsepower Gains! Power When You Absolutely Need It.
• Precise fit, no need to hammer or adjust anything during installation
• All brackets are zinc plated to prevent rust
• Save Big with Free Shipping on ALL Grand Rock Stack Kits!
• Re-metalized, coated weld area, no premature rust on seams
• AccuSeal clamps won’t crush your pipes, leaving exhaust joints serviceable
• All tubes are de-burred and cleaned; no sharp edges or saw chips

This PowerFlow Turbo-Back Dual Stack Kit is a true 4 Inch diameter from turbo to Y-Pipe with 5 Inch diameter from Y-Pipe to the base of the stack tip in the truck bed. Grand Rock’s kits were designed as a “No Muffler” exhaust system and feature AccuSeal clamps for superior joint sealing. The chrome stack tips are 36 Inches in length and feature high quality triple chrome plating for a killer look that lasts. For reference, a 36" stack will be about even with the top of your truck cab. Taller 48 and 60 Inch tips are also available. Please call for pricing.

To protect the contents of your truck bed, choose from MBRP stack in-bed diamond-plated covers or Grand Rock chromed T-Pipe Heat Shields, each sold separately.

7 inch stack tips are available in straight, curved or mitre/angle cuts. Built in the USA. 1 Year Limited Warranty. Have any questions on what’s involved with an install? Go to our videos section to see a complete installation.

Longer or shorter stack lengths are available. If you have a question about a stack kit, give us a call at 801-938-4891, option 1. We also offer 4 Inch, 5 Inch, and 6 Inch exhaust stack tip turbo-back kits from Grand Rock Exhaust for your 2001-2007 GM 6.6L Duramax.

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. 7 Inch Stack Kits usually ship within approximately two weeks and delivery is via FedEx Ground.