Grand Rock Bed Kits for dual stack installation. Designed with ID outlets for use with stacks that have an OD Outer Diameter base. The T-Pipe adds approximately 10” of length (or height) to the stacks when mounted in the bed. Only one hole needs to be cut in the bed, where the T-Pipe inlet goes down through the bed to connect to the under-bed piping (also included).

All the piping in the kit is commercial grade aluminized steel. All clamps are heavy duty and Zinc coated for durability. The kit piping transitions from 4” below the bed to 5” above the bed (except if using 4 inch diameter stacks). Complete 5” Piping Bed Kits are available to use with an existing 5” exhaust. For exhaust systems less than 4 inch, a heavy duty aluminized exhaust reducer/adapter will be added when you select your exhaust size.