Since 1986, STILLEN has been a trusted name in the automotive industry, providing our customers with top of the line performance and aftermarket parts.
Making the most of our trusted name and reputation, STILLEN enjoys many exclusive opportunities including the following:
Exclusive North American distributor for AP Racing brakes and is the only company that AP Racing supports in engineering kits
Exclusive Southern California warrantied installer of Whipple superchargers
Exclusive North American assembler of the NISMO N Attack GT R
Only company in the world who is authorized to work on and service the Ford GT supercar transmission
Only company in the world to achieve CARB legality when tuning a forced induction application through a factory NISSAN ECU
We Know Cars
From our sales and customer service team, who are enthusiast themselves, to our in-house research and development team to our in-house installation center we are constantly testing and developing new products and working with other industry manufacturers to improve their products. These resources allow our Customer Support teams to be the most highly experienced team around.
STILLEN's founder, Steve Millen, enjoyed a wildly successful, multi-decade racing career in which he earned several titles including:
2 time IMSA world champion
2 time Mickey Thompson off-road champion
24 hours of Le Mans class winner
24 hours of Daytona overall winner
12 hours of Sebring overall winner
Winningest driver in IMSA GT history
Today, you can find Steve within the STILLEN campus overseeing new product development, checking in on the progress of installs being done in the service shop, discussing which new vendors to offer our customers and more.
Made in the USA
We design and manufacturer all STILLEN parts in our Southern California based campus, which consists of several warehouses and manufacturing plants that span over 100,000 sq. ft. and allow us to manufacture CNC machined, fabricated tube and sheet metal, and carbon fiber products in-house. To see our capabilities for yourself, stop by for a tour the next time you're in the Southern California area!
Choose from Thousands of Parts
STILLEN manufacturers thousands of products across a variety of vehicle platforms and works with hundreds of vendors to bring you the best selection of parts for your vehicle.
Low Price Guarantee
Bring us any advertised price for a product that we carry and we'll do our best to beat it. We believe that our customers deserve the best price possible for the products they buy, so our team is dedicated to giving you the best possible deal. Always make STILLEN your last stop for maximum savings and excellent customer service.
Add up to 100 Rear Wheel Horse Power & 200 Ft/.lbs Tq;Add 2-3 MPG to Your Fuel Economy
Switch on the Fly- Ramp Your Power up While Driving With "Diablo Dial"
Easy Installation With Factory Spec, Interlocking Connectors
This Product is Stackable With the DiabloSport Predator and Trinity!!!
Part # : DSP1040
DiabloSport is an industry leader in developing new vehicle technology for late model domestic cars and trucks. Instead of focusing on developing products that "fit" your vehicle like other manufacturers such as cold air intakes and exhaust, we focus on communicating digitally with your vehicle in order to control the "vital organs" of your vehicle. Our expertise is the capability to understand and improve complex computer systems while providing our customers with easy to use products. While we have huge investments in high tech machinery in order to manufacture all of our products in house our real assets are our employees combining for over a century of automotive experience. We employ the best of the best in each category from software and hardware engineers, tuners and calibrators, sales and marketing and of course technical support specialists. The true test of a company is "do your employees use the products you manufacture" and a quick walk through our employee parking lot paints the picture of a very enthusiastic group of hardcore automotive individuals.