Banks Power GM Motorhomes: (Gas ’01 - 10 8.1L Workhorse) PowerPack & Stinger systems '01-04 Class-A MH, P-series - Manual (Page 9)

CauTion: The following
step involves cutting the
catalytic converter tubing,
proper safety attire
including safety glasses
and gloves should be
worn.
22.
With the catalytic
converters removed from
the vehicle, measure 16”
in front of the front weld
(approximately 2-
1 ⁄
2
” in front of
the 2nd bend) and vertically
cut tubing (see Figure
10 ).
NOTE: Whenever possible,
it is recommended that
the catalytic converters be
inspected. Restricted or
damaged catalytic converters
can impede performance of
your Banks PowerPack.
23.
Install a 3” clamp onto
each outlet of the Banks
H-pipe. Install the previously
cut inlets of the right and left
catalytic converters into the
corresponding sides of the
H-pipe.
24.
Remove the factory
mufflers, extension pipes
(if applicable) and tailpipes
from the motorhome. Using
a large screwdriver or pry
bar, remove the muffler and
tailpipe hangers pins from
there corresponding rubber
insulators.
Lubricating the rubber
hangers with WD-40 or similar
lubricant will ease removal of
the hanger pins.
25.
Install the crossover pipe
hanger pin into the rubber
insulator previously used for
the front right muffler hanger.
26.
Install the shorter inlet
tube hanger pin into the
driver-side rubber insulator
previously used for the front
left muffler hanger.
27.
Place a small amount of
anti-seize on the (4) 7 ⁄
16
-20x1-
1 ⁄
2
” bolts. Attach the Banks
crossover tube and inlet
tube to each of the catalytic
converter flanges using:
(1) 2-bolt flange gasket
(2)
7 ⁄
16
-20 x 1- 1 ⁄
2
” bolts
(2) 7 ⁄
16
-20 crimplock nuts
(4) 7 ⁄
16
SAE washers
Loosely tighten 7 ⁄
16
” hardware
(see Figure 11 ).
Note: If you have a 178”
wheel-base chassis, proceed
to Step 31.
28.
For 190, 208 and 228”
wheelbases, the factory
driver-side rear muffler hanger
will need to be relocated.
On the outside of the frame,
remove the two (2)
3 ⁄
8
” nuts
Figure 10
Figure 9
9 6 4 3 2 v . 5 . 0
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