How to Install Stillen Chin Spoiler - Unpainted on your Mustang

Materials supplied:
1. Front Splitter
2. 7’ Double-sided tape
3. (16) Self-Tapping Screws
Equipment needed:
1. Sandpaper/Scotchbrite
2. Adhesion Promoter
3. Screwdriver
4. Drill

WARNING:
IF YOU ARE NOT EXPERIENCED IN THE AREA OF BODY REPAIR WE STRONGLY URGE THAT YOU REFER THIS INSTALLATION TO YOUR BODY SHOP.

CAUTION: This part is not a racing part and is designed primarily for aesthetic improvement. STILLEN is not responsible for any damage that may occur when used above speeds that are considered safe for public roads.

NOTE: Preparation of the urethane surfaces to be painted is important to achieve proper fit and finish. However, these components are flexible and attention should be paid to the type of paint chosen for these applications.

NOTES ABOUT INSTALLATION, CLEANING, AND PAINTING

Pre-fit all pieces to the vehicle. Once you are assured that you have the right aero kit, you may proceed. If you don’t, please call Stillen right away. We highly recommend using masking tape anywhere the aero kit may be touching the vehicle body to prevent scratches during the pre-fit.

Do any sanding, filing, or spacing necessary (before painting) for a clean tight fit. Spending the extra time now will ensure a “factory” perfect installation.

PAINTING URETHANE

Urethane components require a special cleaning and painting procedure to obtain a proper finish. Once the urethane components have been properly pre-fitted CLEAN AND SCRUB THEM! Using plenty of hot water, plenty of scouring powder (like AJAXÒ or COMETÒ) and a #7447 Scotch BriteÒ pad. Scrub each piece thoroughly until there are no shiny spots. Scrub all surfaces especially the backside top sections that will be against the body. You will be applying double sided tape to this area so clean and sand it! The goal is to achieve an even dull finish on all surfaces to be painted. After you’ve finished scrubbing the parts completely repeat the procedure one more time. If this is not done properly the paint will not stick!

Any automotive primer will provide excellent adhesion to the part if the surface is properly prepared, however, we do not recommend using lacquer primer on urethane components due to its rigidity. Elastomeric or acrylic primers can be used but elastomeric primers, due to the flex agent added, are preferred over acrylic primers. Light sanding is recommended after primer has dried and before final color painting.

On all the Stillen urethane components, the preferred procedures are:
A. Pre-fit, sand, and shape.
B. Paint
C. Install

INSTALL

1. Hold the splitter up to the vehicle and mark the areas that need to be prepped.

2. The surface of the vehicle must be cleaned for proper adhesion. After cleaning, an adhesion promoter such as 3M ™ part #06396 must be applied to wherever tape will be used.

3. Pull back approx. 1 inch of protective covering on tape from each end. Make sure the film is sticking out. (Fig.1) Place the splitter GENTLY on the vehicle and make sure you have it positioned correctly. It is a good to have a friend help with this. Due to the adhesion promoter you will NOT get a second chance! While holding it in position, pull the tabs you created while applying light pressure. Continue this, taking care not to tear off the tabs by pulling too hard. After all the film is removed, apply firm pressure all around to ensure the tape has bonded properly.

4. Secure the wheel well with 2 self-tapping screws on each side (Fig.2).

5. Secure the underside of the splitter. Use two self-tapping screws in each location depicted in Figure 3 (Fig.3) It is recommended that you drill pilot holes in the locations you will be securing the splitter.

6. Done!! Enjoy the look and styling of your new STILLEN Splitter.