About us

Unknown Performance LLC is a fast growing company manufacturing parts to suit JDM vehicles such as Subaru WRX/STI, Mitsubishi Evo, R35 GTR just to name a few.

We specialize in manufacturing cat back exhaust systems, downpipes, Catalytic Converters, straight pipes, dump pipes aka screamer pipes, intake systems and boxes, dress up hardware, intercooler piping kits, battery trays and continue to add to the list of parts we can provide to the community.

We use highest quality materials, latest cutting edge technology and equipment to produce parts that will meet and exceed expectations with competitive pricing. We strive to provide customers with products that can be used on the street, track, circuit to not only increase their performance but driver experience.