MBRP S8101 User Manual
Page 3

S8101 © 09/09
PAGE 3 OF 4
 
 
6. Loosely attach the Stack 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 Stack 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 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 use a small drill to create a pilot hole. Make sure that there 
is clearance for the 20” 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 Stack 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 Extension Pipe. Mark
and cut the shorter side of the 20” Elbow to the required length 
so that it lines up with the front part of the Extension Pipe. 
Refer to Figure 8. 
11. Attach the 20” Elbow to the T-Pipe slip joint and then attach the
Flex Pipe to both the 20” Elbow and the Extension Pipe. Be 
sure to slide the required Clamps over the 20” Elbow and Flex 
Pipe before connecting it to the Extension Pipe. Refer to 
Figure 9. 
12. Make sure that the Stack Mounting Brackets are centered on
the Stacks and tighten the fasteners holding the Stack 
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
