Grand
Rock offers 5 different styles of stacks available in an assortment of
sizes. From the left, Grand Rock introduces its newest style, the
Aussie, available in 5, 6, and 7 inch. Next, is the classic Straight
Cut and then the Angle/Mitre Cut, both available in 4, 5, 6, and 7
inch. Fourth over is called the Curved/Turnout, available in 4, 5, 6,
and 7 inch. Finally, on the right is the Bullhorn/Bullhauler,
available in 5, 6, and 7 inch.
To order your Grand Rock
Stack Kit, simply choose your options from the boxes in each category.
Some items will add to the "base price" and will show you accordingly
how much it will increase the kit cost. First off, you will choose
whether you simply want a "cab-back" design, in which the hookup for
the stacks is right at the back of the cab of the truck, and you will
use your factory exhaust from there to the turbo. Otherwise, you may
choose "turbo-back," in which you will replace ALL exhaust from the
turbo to the stack with four inch.
Your next option will be stack size. Four inch is the baseline size
for stacks, and each additional inch in diameter, costs an additional
$100. The Bullhorn/Bullhauler and Aussie stacks are not available in
four inch, so if you are going to order these, you must choose either
five, six, or seven inch. Next, of course, is your stack style.
Straight cut (flat top) stacks are the baseline (no additional charge),
but you may choose any of the five styles that suit your tastes.
Next, you will choose your exhaust hookup size. If you have stock
exhaust, it is three and a half inch. So, if you plan on leaving your stock
underbed exhaust, choose three and a half inch, which will ship with a three and a half to
four inch adapter, because Grand Rock only has either a four or five
inch hookup size. If you are purchasing a turbo back kit, choose four
inch. Finally, if you have already installed a 5" exhaust, then you
would choose 5" hookup size.
And after this, YOU'VE DONE IT, you've built your Grand Rock stack
kit! Now get 'em put on, and start enjoying the sound and stares
you're getting from your new stacks!