DUAL STACKS with COMPLETE INSTALLATION KITS
includes Hardware
INSTALLATION INSTRUCTIONS |
4" Dual Stacks with
Complete Installation Kit
ONLY $408.80
UPS Ground Shipping $65
BullHauler & Aussie Stacks not available in 4"
Select adapter that is the size of your existing exhaust system. Adapter and clamp will add to total price! |
5" Dual Stacks with Complete
Installation Kit
starting at $484.26
*Stack styles and adapters increase the base price
UPS Ground Shipping $70
Select adapter that is the size of your existing exhaust system. Adapter and clamp will add to total price! |
6" Dual Stacks with Complete
Installation Kit
starting at $680.27
*Stack styles and adapters increase the base price
UPS Ground Shipping $75
Select adapter that is the O.D. size of your existing exhaust system. Adapter and clamp will add to total price!
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7" Dual Stacks with Complete
Installation Kit
starting at $857.99
*Stack styles and adapters increase the base price
UPS Ground Shipping $80.00
Select adapter that is the O.D. size of your existing exhaust system. Adapter and clamp will add to total price!
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NEW 8" Aussie, Mitre or Straight Cut Stacks
with Complete Installation Kit for 4" or 5" Exhaust
Starting at $ 992.39
Stack styles and exhaust size may increase the base price.
8 inch stacks are compatible with 4 or 5 inch under-bed piping, but not recommended for smaller exhausts.
UPS Ground Shipping $100.00
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DUAL STACK IN-BED HEAT SHIELDS
Protect your T-Pipe from dents, give it a clean, professional look, keep loose material from collecting around stacks |

Diamond Plate Bed Kit Cover Bright Aluminum .... starting at $318.85
UPS Ground Shipping $65
Cover kit will fit stack sizes 4"-6",
larger stacks will require modification
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180° T-Pipe Heat Shield
48" Bright Stainless
From $128.66
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Complete Stack Installation Kits includes Hardware
( Stacks not included ) |
4" Dual T-Pipe Kit, EVERYTHING BUT THE STACKS for 4 Inch Stacks
4" T-Pipe with 4" Inlet, 4"Elbows and 4"FlexPipe, clamps and mounting brackets.
Will only fit 4" O.D. stacks.
$266.54
plus UPS Ground $50.00
| 5" Dual T-Pipe Kit
EVERYTHING BUT THE STACKS for 5, 6, 7 & 8 Inch Stacks
Installation Kit only (not including stacks) is comes with 4" under-/5" above-bed piping for exhaust sizes up to 4".
For smaller exhausts select size to add reducer and clamp. If you have a 5" exhaust, order the all 5" piping kit see below. All listed kits accept our 5", 6" and 7" Stacks which all neck down to a 5" O.D. base.
Starting at $317.66
Exhaust size may increase base price.
plus UPS Ground Shipping
$55.00
If you already have 5" Exhaust, Order Here:
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Single Stack Kits- Installs on passenger side
Install Instructions |

4" Single Stack Kit
This kit has a 4" thru Bed Inlet Pipe and will only accept 4" stacks.
BullHauler & Aussie Stack not available in 4"
4" Single BedKit - no stack* From $155.99 plus shipping
*Stack styles and adapters increase the base price
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5, 6, 7 & 8" Single Stack Kits
This kit is 4" under bed expanding to 5" above bed piping, and
will accept our 5, 6, 7 & 8" stacks.
Select with or without stack. If you have a 5" exhaust order the all 5" piping kit below.
Kits start from $236.02 plus shipping
*Stack styles, sizes and adapters increase the base price
If you have a 5" exhaust select here:
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Stacks and Installation Parts (Separate)

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Stacks Sold Individually:
4, 5, 6, 7 & 8 inch Diameter Stacks
Select by either 36, 48 or 60"Length
ALL 6" & 7" stacks neck down to 5" OD
BullHauler and Aussie Stacks Not Available in 4" *PRICE IS FOR ONE STACK, IF YOU WANT TWO, SELECT QUANTITY "2"
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Internal Mufflers: Sold Individually
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For 4" Stacks with 4" O.D. base:
$37.50 each
For 5", 6" & 7" Stacks with 5" O.D. base:
$40.00 each
plus UPS Shipping |
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STACK CLAMPS (only)
Bright Stainless
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For attaching
4, 5, 6 or 7 inch
Stack(s) to your bedrail
using L-Bracket(s) sold separately
Single $15 + $10 shipping
Dual $25 + $12 shipping
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L-BRACKETS (only)
Left / Right
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For attaching 4, 5, 6 or 7 inch
Stack(s) to your bedrail
using Bright Stainless Clamp(s) sold separately
$12 each + $10 shipping |
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Bright Stainless Stack Clamp
& L-Bracket SETS
for attaching
4, 5, 6 or 7 inch
Stack(s) to your bedrail
sold in sets:
Dual Set Pictured |
Single Set (1 clamp, right bracket)
$21 + $15 shipping
Dual Set (2 clamps, right&left bracket)
$42 + $20 shipping
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Reducer & Clamp SETS
 Exhaust Reducer/Clamp

4" to 5" Chrome Reducer pictured |
Aluminized Exhaust Reducer/Clamp:
3.5"-to-4" reducer & clamp $19.98 + $15 shipping
- 3.0"-to-4" reducer & clamp $19.98 + $15 shipping
- 2.5"-to-4" reducer & clamp $21.98
Plus $15 shipping
Chrome Reducer
4" to 5" Chrome Reducer with Stainless clamps used in single stack hook-up
Aluminized also available
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Flexpipe & Flexpipe Clamps
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304 Stainless Steel Commercial Grade Flexpipe with special wide flexpipe clamp set
$53 + $20 shipping
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Under-the-Bed 4 inch Elbow
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Commercial Grade Aluminized Steel Custom-sized Elbow with 4 inch clamp (clamp not pictured)
$55 + $20 shipping |
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SHORTY STACK KIT (stack not included)
For Your Custom, Single Stack Installation -- no "S-Pipe"
You will need to tack weld elbow to underside of the bed for secure installation
$259.00
$45 UPS Shipping
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Our Stacks are simply the best in Quality and Durability . Made in USA.
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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