2015-2017 Whipple Stage 3 Closed Airbox  Sound Tube Installation Guide SKU 467 1300

2015-2017 Whipple Stage 3 Closed Airbox Sound Tube Installation Guide

This kit offers higher levels of rotor sound (whine) within the cabin due to the direct path through the firewall and the larger ID. This Kit requires that the firewall is drilled.
  1. 1 x 1 x 3/4” hole saw
  2. 1 x Blade
  3. Sound Tube
  4. 2 x Large rubber grommets
  5. 1 x Zip tie

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 and fold the insulation up and down behind itself to expose the area for drilling. Image of Exposed Firewall

Use a center punch to mark the drilling point for the 1 3/4” 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) and see the seam.

After using the center punch to mark the drill entry point, drill using the supplied hole saw at low speed and using a light oil for lubrication to avoid (overheating) and damage to the drill bit.

Make sure the drill hole saw is flush with the firewall sheet metal as not to catch and edge and damage drill bit

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

Locate the “V” like contour in the air box wall as shown in the image, using your fingers.

This can also be seen upon visual inspection.

With the airbox in place, using a tape measure locate a point 4” from the top of the airbox and using a slight angle, drill in the “V” shaped area approx. ¼” to the left side of the wall.

Be sure to check for coolant hose clearance on the other side as to not damage when drilling.

Coolant lines may be routed slightly differently on each application.

Install the supplied large rubber grommet working into the 1 3/4” hole which was cut in the firewall. Use some 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 fire wall hole with grommet first, it should be possible to fit your entire arm into the space and your hand all the way to the fire wall. A little grease from the grommet or WD40 will aid in pushing the sound tube hose end through the grommet. Use fingers to pinch in the end of thetube and insert into the hole with a twisting motion. Electrical tape can be wrapped around the end of the sound tube hose to reduce the tube diameter and aid insertion into the grommet.

It may be necessary to go inside (the footwell area) to pull the hose end through to a depth of about 1 ½ “ using pliers.

Image showing the sound tube inserted through the grommet and firewall hole.

Insert the large grommet (supplied) in the drilled hole in the air box to secure the sound tube.

Use your fingers to pinch the end of the hose while pushing hard to insert the hose into the grommet. Use grease or WD40 on the inside of the grommet and hose end to aid in installation.

Image shows the sound tube in position from inside, after being inserted into the airbox. 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.

This Image shows the position of hose installed and positioned at the rear of the shock tower.

The almost straight position and direct path of the sound tube to the firewall, allows for more sound transfer into the cabin and a greater effect than the stock OEM sound tube.

Secure the sound tube to the shock tower with the supplied zip tie. Loop the zip tie through the 2 holes and around the sound tube in the shock after removing the small clip.

The installation is now complete.