Want to add serious aggressive looks
AND sound to your 2001-2007 6.6L GM Duramax? We have just
the answer to turn heads and separate your truck from the crowd! Grand
Rock introduces their PowerFlow Chrome Stack Kits, designed
specifically for our pickup trucks. We offer several styles, including
Straight Cut, Curved, Mitre Cut, Bullhorn, and the NEW Aussie Style!!!
Most stack kits are available in 4, 5, 6, and even 7 inch diameter!
Grand RocK kits are designed for an existing four or five inch exhaust
under the truck. On the 2001-2007 Duramax, if you have not
modified any of the factory exhaust, you have a three and a half inch underbed
hookup. If you are planning on upgrading the exhaust system to a
complete turbo back four inch, we even have full four inch turbo to
stack kits available. If you do not want to upgrade the underbed
exhaust size, you will simply need a three and a half to four inch adapter, which
is available as an option at the bottom of the option list. Turbo to
stack kits are sold as "full-flow" kits in which there are no
traditional style mufflers included. However, Grand Rock stacks do
ship with a sleeve style muffler that inserts into each stack. When
ordering a four inch stack kit, a four inch in-bed “T” pipe kit is
included. When ordering a five, six, or seven inch stack kit, a five
inch in-bed kit is included. Stack kits are available in our more
popular dual stack kits, but single stack passenger side exit kits are
also available.
Grand Rock prides itself in making the finest exhaust stacks in the
industry, and double nickel chrome all stacks. Each one of the kits
you will find on our website feature 36” stacks, which will bring the
tips several inches above the cab on most full size trucks. But for
those of you who want something different, CALL US!!! We are able to
obtain Grand Rock stacks in many different lengths, for those who want
to push the extreme, or are doing something even a bit more custom.
Note:
All pricing includes 36” chrome-plated stacks with complete
installation kit. Call for pricing and ordering on different lengths
and finishes, or for individual stack pieces and/or parts.
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