Turbo Dual Stack Kit GM DMAX 01-07(notLMM)- For 6" Stacks

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Turbo Dual Stack Kit  GM DMAX 01-07(notLMM)- For 6" Stacks

NOTE: Questions, Call 715-254-2307

Turbo Dual Stack Kit GM DMAX 01-07(notLMM - For 6" Stacks

4" Turbo Back Stack Exhaust System (Stacks Not Included) Commercial Grade Aluminized Piping is 4" under-bed, expands to 5" above the bed. 

Everything but the Stacks

Performance exhaust system



  • All Hardware
  • All the parts you need to complete installation.
  • For 6 Inch OD Stacks 5" T-Pipe with 4" Inlet, 4" Elbows and 4" Flexpipe, clamps and mounting brackets.
  • internalmuff.jpg Free Bonus- IM-518 Internal Stack Mufflers Included
  • Grand Rock Stacks are Made In America!                                 
Warranty Information: Chrome-plated (except weld area) and aluminized parts used on heavy duty truck exhaust systems are warranted against defective material and workmanship for a period of 1 year from date of shipment. Call if you have questions on proper installation techniques. Grand Rock and Black Cloud Diesel cannot be held liable for damage done as a result of improper installation. If a part is determined to be defective, Grand Rock and Black Cloud Diesel reserve the right to replate only and return the part when the part has been modified, altered, or otherwise damaged. Neglect is not Warranted! Keep the parts clean & waxed!

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  • 4
    Perfect fit

    Posted by Philip Koch on 21st May 2017

    Awesome kit nice bends and heavy gauge steel. No directions so the average joe may have some issues installing. Had a couple issues with the packaging, ends of some of the pipes were bent the most difficult one to fix was the front flange pipe to the down pipe it was folded over pretty good. Missing one of the Mufflers, and the flex pipe clamps were all bent flat. Had two sections of pipe left over, they could have kept them and knocked of a hundred dollar bill