STILLEN urethane Aero Parts are designed, prototyped, tested, and built in STILLEN facilities in Costa Mesa, California. Care is taken to manage air flow as well as to blend the lines of each part with the vehicle. The effect is a distinctive statement that fits; each part looks like it came from the factory's design studio. Installation and paint should be done by and experienced and quality oriented body/paint shop. All of the STILLEN urethane parts are so flexible, durable and impact resistant that STILLEN guarantee our urethane components against breakage or cracking in normal use for as long as you own your vehicle. These urethane products are so tough, STILLEN included a Limited Lifetime Warranty.