MBRP S8100 User Manual
Page 3

S8100 © 12/09
PAGE 3 OF 4
 
 
6. 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 T-Pipe 
Assembly is level. 
7.
Mark the bed floor where the T-Pipe is resting. MBRP Inc.
recommends tracing around where the T-Pipe meets the bed 
floor. Refer to figure 5. Remove 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 then center punch mark use a 
small drill to create a pilot hole. Make sure that there is clearance 
for the 14” Elbow to pass by any frame cross members. Remove 
or modify any heat shields that there is interference with. 
8. Cut a hole through the truck bed providing adequate clearance
around the part of the T-Pipe that passes through the truck bed. 
MBRP Inc. recommends using a 5” diameter hole saw. It may be 
required to cut away part of a bed rail. Refer to Figure 6. 
9. 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 up to the 
exhaust under the vehicle. Refer to Figure 7. 
10. Measure from the T-Pipe slip joint to the exhaust system you are
connecting to. Mark and cut the shorter side of the 14” Elbow to 
the required length so that it lines up with the front part of the 
exhaust system. Refer to Figure 8. 
11. Attach the 14” Elbow to the T-Pipe slip joint and then attach the
Flex Pipe to both the 14” Elbow and the Extension Pipe. Be 
sure to slide the required Clamps over the 14” Elbow and Flex 
Pipe before connecting it to the vehicle’s exhaust system. Refer 
to Figure 9. 
12. Make sure that the Mounting Brackets are centered on the
Stacks and tighten the fasteners holding the Mounting 
Brackets to the front of the truck bed. Tighten all Clamps 
making sure that the Stacks remain properly aligned. 
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
