MBRP S8000 User Manual
Page 4

1. Loosely assemble the in bed portion of the “T” Pipe assembly. Some models 
may require trimming of the “T” Pipe in order to accommodate the width of the 
truck bed and the stacks that have been purchased. Be sure to place the clamps 
over the pieces before they are assembled. 
2. Place the Stacks onto the “T” Pipe assembly and place into the desired 
position in the truck bed. The “Long 90” should be on the driver side so that the 
“T” Pipe passes through the bed floor on the passenger side. Refer to Figure 1. 
 
Figure 1
3. Place the Mounting Brackets between the Stacks and the front of the truck 
bed so that the Stacks are properly spaced from the front of the truck bed. Center 
the Mounting Bracket on the Stack and mark the front of the truck bed in the 
center of the slotted holes in the Mounting Brackets. Center punch the marks 
and drill holes to accommodate a 3/8” Bolt. Refer to figure 2.
4. Loosely attach the Mounting Brackets to the front of the truck bed using the 
3/8” hardware supplied. Set the Stacks up in the bed and loosely attach them to 
the Mounting Brackets. Make sure the Stacks are in the desired position and the 
Figure 2
“T” Pipe assembly is level.
5. Mark the bed floor where the “T” Pipe is resting. MBRPinc. recommends 
tracing around where the “T” Pipe meets the bed floor. Refer to figure 2. 
Remove the Stacks and “T” Pipe assembly from the bed of the truck. Find the 
center of the circle traced onto the bed floor, mark and center punch it. Go under 
the vehicle and locate the center punch mark. This marks the location where you 
are going to cut a hole for the “T” Pipe to pass through the bed of the truck. If 
you cannot find the center punch mark measure to it in the bed and transfer these 
measurements under the vehicle. Make sure that there is clearance for the Elbow 
to pass by any frame cross members. Remove or modify any heat shields that
Figure 3
there is any interference shields that there is any interference with.
6. Cut a hole through the truck bed providing adequate clearance around the part 
of the “T” Pipe that passes through the truck bed. MBRPinc. recommends using 
a 5” diameter hole saw. It may be required to cut part of a bed rail away. 
 
 
 
 
 
 
Figure 4
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.
 
 
 
Figure 5
S8000 © 03/06
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