2015-2017 Roush/VMP Stage 4 Inlet Tube Sound Tube Installation Guide SKU 800

2015-2017 Roush/TVS Stage 4 Inlet Tube Sound Tube Installation SKU 800

This Kit requires that the firewall is drilled. Contents:

  1. Drill bit
  2. Blade
  3. Sound Tube
  4. Grommets, small and large groove
  5. Zip tie
  6. Grease
  7. Diaphragm cap

Fold the carpet down in the driver side footwell behind the brake pedal to the left of the steering column & secure by inserting a small screw as shown in the image through the carpet.

Pull the retaining clip off the carpet stud to enable the cutting of the insulation.

Cut the insulation along the horizontal line with supplied blade.

Use a center punch to mark the drilling point for the hole. Draw a line across from the steering column bracket point. Draw a second vertical line approximately ¼” from the raised sheet metal contour as shown the image.

To determine the exact point, you will be able to feel (using your fingers) After using the center punch to mark the drill entry point, drill a pilot hole first then using the supplied drill bit at low speed and using windex as lubrication and cooling to avoid (overheating) and damage to the drill bit. Drill on low speed and keep pumping the windex flooding the bit.

Make sure the drill and hole saw is flush with the fire wall sheet metal as not to catch and edge and damage drill bit. Drill all the way through with the bit.

Use protective cloth or paper towel taped to the firewall to catch the drill debris and filings produced during the drilling process. Vacuum filings after drilling.

With provided drill bit, drill out the inlet pipe to 32mm or 1 ¼” at the red/green mark location in the picture below except on the bottom, 180 degrees from the mark. BOTTOM of the MAF housing.

Install the supplied wider grooved grommet working into the hole which was cut in the firewall. Use supplied grease on the bare metal edges for protection. Add some grease to the grooves of the grommet to prevent corrosion.

Install the sound tube through the firewall hole with wider grooved grommet in place. It should be possible to fit your entire arm into the space and your hand all the way to the firewall.

Use supplied grease inside the grommet and on the tube end which will aid in pushing the sound tube hose end through the grommet in the firewall.

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The rubber diaphragm must be used to seal off the sound tube from the inlet path. This ensures the MAF and calibration is not changed. Use supplied grease on the hose end and push the cap on the end of the sound tube fully seating the cap. You will need helper to hold the engine side of the sound tube to ensure it’s compressed together.

Warning: failure to install the diaphragm cap properly could result in unmetered air and poor running condition.

Fold back the carpet insulation into its original position and use the supplied blade to trim the edge of the carpet to the diameter of the sound tube.

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