Grand Rock Turbo Back Stack Kits for Diesel pickup trucks are Complete Turbo Back Exhaust Systems with Stacks made from the the highest quality chrome! Chrome is heat resistant and does not turn yellow from heat or gray from oxidation.
Turbo Back Stack Kits for installing 4 Inch Stacks use all 4 inch clamps, hardware and piping.
Turbo Back Stack Kits for installing 5, 6, 7 and 8 Inch Stack use 4 inch clamps, hardware, and piping below the bed and expands to 5 inch above the bed- The inlet of the t-pipe is 4 inch, the t-pipe expands to 5 inch above bed, t-pipe, clamps and hardware above bed are 5 inch. Our 5, 6, 7 and 8 inch stacks have 5" OD Base that fits into the t-pipe outlets.
Select what truck you're putting it on, and what size and style stacks you want.