Banks Power GM Motorhomes: (Gas ’01 - 10 8.1L Workhorse) PowerPack &Stinger systems '00-07 Class-A MH, W-series - Manual (Page 4)

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10.
With the vehicle safely
raised, ground wire(s)
disconnected, and other
precautions in place, the
factory exhaust system can
be removed.
11.
Locate the oxygen
sensors in the exhaust
headpipes on each side of
the engine, forward of the
catalytic converters. Unplug
the connectors and unscrew
the oxygen sensors, keeping
track of the left and right
sensors.
12.
Disconnect from the
headpipes the oval 2-bolt
flange at the front of
the catalytic converters.
Disconnect the headpipes
from the exhaust manifolds
and remove the headpipe
assembly.
NOTE: Whenever possible,
it is recommended that
the catalytic converters be
inspected. Restricted or
damaged catalytic converters
can impede performance of
your Banks PowerPack.
13.
To provide better access
to the manifolds remove the
front wheels from the vehicle.
Note: Before removing
the lug nuts, make sure a
capable torque wrench is
available to tighten the lug
nuts to the manufacturer’s
torque specifications.
If the vehicle is equipped with
inner front fender shields,
remove them for improved
access. If applicable, remove
the two nuts securing the EGR
tube to the rear of the right-
side exhaust manifold.
14.
Unbolt the brackets from
the alternator support and
manifold stud (see Figure
1 ). Remove the dipstick
and dipstick tube by pulling
and twisting upward. If the
dipstick tube o-ring is stuck
inside the hole in the engine
block, remove it and place it
back onto the dipstick tube.
15.
Remove the spark-plug
wires and the spark plugs
from both sides of the engine.
Note their original locations
so they can be properly
reinstalled.
16.
Remove the nuts
holding the spark-plug wire
heatshields to the exhaust
manifold studs. Remove the
heatshields.
17.
With a wrench or socket,
back the exhaust manifold
nuts at least one turn away
from the manifolds. Use a #7
female torx socket to unscrew
each stud from the head. If
this tool is not available use a
7 ⁄
32
socket. Take out the studs
so the exhaust manifolds can
be removed.
18.
caution: Make sure all
ground cables are removed
from vehicle’s battery(s).
Remove the starter wire
battery cable from the starter
motor. If the starter cable
runs to the front of the motor
installation instructions
Figure 1