Figure 5 7. Set the T-Pipe Assembly at the desired height from the floor of the bed (This will set the height of the Stacks). Using spacers to hold the T-Pipe at the desired height, loosely attach the Stacks to the Mounting Brackets making sure that they are straight. This will hold the assembly steady while you line the system up to the exhaust under the vehicle. Refer to Figure 5. 8. Measure from the T-Pipe slip joint to the exhaust system that you are connecting to.