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How to Install Spectre Cold Air Intake - Polished on your Sierra
Installation Time
2 hours
Tools Required
- 5/16” or 8mm Nut driver
- 6mm Nut driver
- Ratchet
- 10mm socket
- T15 torx
- Phillips screwdriver
Shop Parts in this Guide
Parts List
1 - Intake tube
1 - Air filter
1 - Heat shield- Large
1 - Heat shield- Small
1 - 4” Offset velocity stack adaptor
1 - 4” x 3 1/2” Reducer coupler
1 - 3 1/2” 90° Rubber elbow
2 - 5/8” Hose clamps
3 - 3 1/2” Hose clamps
1 - 4” Hose clamp
1 - 6” Hose clamp
3 - Allen bolts
3 - Flat washers
3 - Locknuts
1 - Allen wrench
1 - Rubber seal
1 - 5/8” Breather hose
2 - M4 Machine screws
1 - Adapter ring
Step 1
Safety first! Before you begin the installation, make sure that the vehicle is in park (or neutral for a manual transmission) with the parking brake set. Disconnect the negative battery terminal and verify that all components that are listed are present. Note: This kit was designed and tested on a stock engine without any custom tuning done to the engine computer. Removing the battery cable may erase the programmed radio stations. The anti-theft code will need to be entered into some radios after the battery cable is connected. The anti-theft code can typically be found in the owner’s manual or at your local dealership.
Step 2
Loosen the clamp at the air box.
Disconnect the Mass Air Flow
Sensor (MAFS) electrical connector
and unclip the wiring harness from
the air box.
Step 3
Disconnect the breather tube from
the engine. There is a small tab
on the end of the tube, push it to
release the breather tube.
Step 4
Loosen the clamp at the throttle
body and remove the factory
plenum from the vehicle.
Step 5
Remove the air box assembly by
pulling up and out firmly.
Step 6
Remove the air box mounting plate.
Three of these bolts will be re
installed with the new heat shield.
Step 7
Remove the MAFS from the factory
air box.
Step 8
Insert and fasten the MAFS onto
the Spectre Performance intake
tube with the provided machine
screws.
Step 9
Assemble the heat shield with the tabs placed on the outside of heat shield. Install the rubber bulb seal. Place the velocity stack adapter in the heat shield and install the supplied flex coupler making sure the coupler is pushed completely against the heat shield. Take note of the orientation of the funnel, this may be rotated slightly once the filter is installed in the vehicle. Once the adapter and coupler are tight against the heat shield, tighten the clamp.
Step 10
Install the heat shield into the truck
as shown by reusing the hardware
from the tray. If the holes do not
line up with the heat shield, see the
next step to resolve this.
Step 11
This step is only required if your
heat shield bolt pattern did not line
up in Step 10. Loosen the 4 bolts
shown, but do not remove them.
Install the heat shield and fasten
it securely in place. Once the heat
shield is in place, securely fasten
the 4 bolts that were just loosened.
Step 12
Remove the bolt shown and rotate
the brace towards the engine.
Step 13
Install the filter and fully tighten the
clamp.
Step 14
Reinstall the bolt that was removed
in Step 12.
Step 15
Install the throttle body adapter
ring onto the throttle body.
Step 16
Install the 90° boot on throttle body
with the short side on the throttle
body and clamp on the throttle
body side to secure the boot in
place. Install a second clamp but
do not tighten at this time.
Step 17
Install the intake tube as shown
and once in position tighten
clamps.
Step 18
Connect the supplied hose to the
breather tube on the motor. Install
the new hose onto the vacuum
fitting on the intake tube.
Step 19
Reconnect the MAFS wiring
harness.
Step 20
Make sure that all clamps and hardware are fully tightened. Reconnect the battery cable, start the vehicle and let it warm up. Shut off and inspect the installation once more for any loose clamps, wires, or hardware. Test drive & enjoy! Your installation is now complete. Periodically check all clamps and brackets.
