INSTALLATION MANUAL
RFI COLD AIR INTAKE
Applications RFI Part Number
GM Duramax 6.6L LML
Stage 2 RFI ‘13-‘15
Not legal for sale or use in California on pollution-controlled vehicles.
53108
RFI COLD AIR INTAKE RFI COLD AIR INTAKE
Introduction
This manual provides step-by-step installation instructions for
the Bully Dog Rapid Flow Induction (RFI) Cold Air Intake for
the GM Duramax Diesel 6.6L LML ’15+ engines. Installation
requires a few basic tools and takes about 20 minutes.
Table of Contents
Parts and Tools .......................1-4
Installation ...........................4-14
Maintenance .........................14-16
Parts Included
RFI Enclosure Lid .................... (53102-1)
RFI Enclosure Base ................... (53102-2)
Air Intake Tube with MAF Mount ......... (53103-3)
Stage 2 Air Intake Tube ................ (53108-3)
Silicone Coupler – Straight ............. (53104-11)
Silicone Coupler – Hump .............. (53104-12)
5” Worm Drive Band Clamps (2) ......... (51104-7)
5.5” Worm Drive Band Clamps (2) ....... (52102-94)
Air Filter with Band Clamp ............. (224800)
Black Oxide Phillips Screws 1/2” (2) ...... (51103-94)
Black Oxide Phillips Screws 3/8” (2) ...... (54100-94)
T20 Security Torx® Bit ................ (229120)
Nylon Washers (6) .................... (51201-94)
MAF Replacement O-ring .............. (53103-94)
M6 Flanged Bolts (3) .................. (53254-98)
Tools Needed
• Flat-head screwdriver
• Phillips screwdriver
• Bit driver
• 10 mm socket and wrench
Parts Description
RFI Enclosure Lid
The easy-to-remove lid
allows for hassle-free lter
maintenance. Heavy duty
latches ensure that the lid
creates a good seal with the
enclosure base and that the
latches close securely.
RFI Enclosure Base
There are four enclosure
features to note to ensure a
smooth installation: (1) the
foam secured to the inlet of
the box which allows it to
seal tightly to the side of the
truck, (2) the round hole on
the bottom of the box which
allows for drainage and even more cool airow from the wheel
well, (3) the mounting pegs that are located on the bottom of the
enclosure and used to secure the enclosure base to the OEM
mounting plate in the engine bay, and (4) the circular hole on the
back of the enclosure where the intake tube will be attached.
Air Intake Tube with MAF Mount
The air intake tube comes
with a precision-made
mass air ow sensor mount
with inset screw mounts.
The tube is designed with
a snap-t feature that will
secure it to the RFI base.
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RFI COLD AIR INTAKE RFI COLD AIR INTAKE
Stage 2 Air Intake Tube
Designed to t in your
engine bay, the stage 2 air
intake tube improves air ow
into the turbo through the
smoothest curves possible
to prevent any loss of power
and provide sleek style
under the hood.
Silicone Coupler
These high quality 3-ply
couplers are durable, exible
and strong.
Band Clamps
Adjustable clamps connect
and hold all tubing in place.
Black Oxide Pan Head
Screws
Bully Dog provides screws
to secure the MAF sensor to
the air intake tube.
T20 Security Torx® Bit
The mass air ow sensor is
attached to the stock intake
tube using tamper resistant
pin-in-Torx® screws. Bully
Dog includes a Torx® bit for
convenience. If the bit is lost it can be purchased at any auto
parts store.
Nylon Washer
These nylon washers protect
the mass airow sensor and
prevent it from being bent
when it is attached to the air
intake tube.
MAF Replacement O-Ring
Meant to replace the
Air Filter & Band Clamp
The Rapid Flow Induction
Cold Air Intake system
includes an ISO 5011
certied eight-layer oil lter.
The air lter is housed within
the intake enclosure and
secured onto the end of
the air intake tube using the
included lter clamp and a at-head screwdriver.
3 4
orange O-Ring beneath the
stock MAF sensor, this ring
ensures a tight seal between
the MAF sensor and the
Bully Dog intake tube.
RFI COLD AIR INTAKE RFI COLD AIR INTAKE
2. Release the locking tab and unplug mass air ow sensor.
Installation
Installation is very simple, and
can be separated into three
parts: Removing the Stock
Intake, Preparing the Bully
Dog RFI Intake and Installing
the Bully Dog RFI Intake. The
complete installation of the
RFI Cold Air Intake system
should take about 20 minutes.
The assembly diagram below
shows how the parts of the
intake t together in sequence.
Removing the Stock Intake
1. IMPORTANT
3. Release the locking tab and unplug temperature sensor
which is located on the backside of the box.
Before beginning installation,
disconnect your battery at the
negative terminal. Failure to
disconnect the battery could
result in personal injury and/or
damage to your vehicle.
5 6
4. Use a at-head screwdriver to loosen the band clamps
located at each end of the stock intake tube. You do not
need to completely disconnect the clamps, just loosen them
enough to remove the tube.
RFI COLD AIR INTAKE RFI COLD AIR INTAKE
5. Remove the stock intake tube.
6. Remove the OEM intake box. The OEM box is held in place
by rubber grommets, so it will easily pop out if you gently
pull upward.
7. Use a 10 mm socket to remove all four machine screws from
the mounting plate and remove the mounting plate.
Preparing the RFI Intake
1. Snap the Bully Dog air intake tube with MAF mount into the
Bully Dog RFI enclosure base.
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RFI COLD AIR INTAKE RFI COLD AIR INTAKE
2. Use the T20 Torx bit to remove the MAF sensor from the
OEM intake tube.
3. Swap the OEM MAF O-ring for the Bully Dog O-ring.
5. Use the T20 Torx bit to remove the temperature sensor from
the OEM box.
6. Attach temperature sensor to the Bully Dog Stage 2 intake
tube. Use the nylon washers and the black oxide Phillip
screws provided by Bully Dog. Use one washer on each
side.
4. Attach the MAF sensor to the Bully Dog intake tube. Use the
nylon washers and the black oxide Phillips screws provided
by Bully Dog. Use two washers on each side.
IMPORTANT: Do not overtighten the screws, as
this could damage the MAF sensor.
9 10
RFI COLD AIR INTAKE RFI COLD AIR INTAKE
7. Connect the silicone couplers to the stage 2 air intake tube.
Do not tighten the band clamps. Leave them loose so you
can adjust the couplers into the correct position.
Installing the RFI Intake
1. Mount the RFI Enclosure Base in the space made by
removing the stock intake. Use the three provided M6 ange
bolts. Failure to use the bolts provided by Bully Dog could
result in damage to the RFI.
2. Connect the stage 2 air intake tube to the Bully Dog air intake
tube (with MAF mount) and the turbo inlet tube in the engine
bay. Leave the band clamps loose until you are sure that all
of the connections are properly aligned, and then tighten the
clamps with a at-head screwdriver.
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RFI COLD AIR INTAKE RFI COLD AIR INTAKE
5. Reconnect the MAF and temperature sensor plug and
3. Install the air lter by connecting it to the air intake tube
inside the enclosure and tightening the band clamp with a
at-head screwdriver.
the battery. Start the vehicle, listen for leaks and check all
connections. Go for a ride and enjoy!
4. Install the RFI enclosure lid. Make sure that the lid is
properly aligned. Snap the four latches over the mounts on
the lid, rmly securing it to the enclosure base.
13 14
RFI COLD AIR INTAKE RFI COLD AIR INTAKE
Filter Maintenance
The intake system should be cleaned with the Bully Dog RFI
Cleaning Kit at least once every three months; in dusty climates,
the lter should be cleaned more often. Maintaining the intake is
a two part process: cleaning and then oiling the lter.
Cleaning the Filter
1. Remove the lter from the RFI enclosure.
Clean the enclosure if necessary.
2. Remove surface dirt (this step can be
avoided if a Bully Dog RFI Prelter has
been installed).
• Lightly tap the lter.
• Use a soft-bristle brush to remove any
loose particles.
3. Spray the cleaner generously over the
lter and let it soak for 10 minutes.
4. Thoroughly rinse the lter.
2. Continue applying the oil to the lter until the entire lter
is covered in an even amount of oil. Apply enough oil to
make the lter a solid and uniform blue, but do not go
beyond that.
3. Allow the oiled lter to sit 20 minutes. Re-oil any dry spots
that appear. Do not oil the lter excessively. Excessive
oiling can cause damage to intake sensors.
Prelter
The Bully Dog RFI Prelter is a semi-water-
repellent barrier that will keep bugs and
debris out while lengthening the
time between lter cleanings
and reducing the amount of
time you spend cleaning the
lter.
• Use regular tap water.
• Avoid high-pressure hoses.
• Prevent dirt from entering the lter by rinsing from inside
out or from the clean side to the dirty side.
5. Let the lter air dry.
• Do not use any method to speed up the drying process.
• Using a blow dryer or compressed air can disgure the
lter and allow particles to pass through.
Oiling the Filter
1. Apply a small amount of oil to the soft-bristle brush and
gently spread the oil over the lter. Be sure to apply only
a small amount of force so the lter is not damaged.
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RFI COLD AIR INTAKE RFI COLD AIR INTAKE
Notes Notes
17 18
Doc.# 53108 V1.2
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