Celebrating 20 years of selling the highest quality parts at the lowest prices. Guaranteed.

"...the liquid to air system I purchased from you works awesome. I have a 5 gallon fuel cell for a water tank. I fill the cell with 22#s of ice, plus water, and after a turbo run there is no ice remaining in the cell!"

"Thanks for the response. We have an inside joke that you guys only hire ninjas with how fast your service is. SIS is definitely the first place I check for parts. You guys have a great thing going on there. Thanks!"

"cold air intake for my civic at 1/4 the price, and 10X the looks"

"Your products rock! I really enjoy your stuff, it makes building a car so much better. All the angles, bends, sizes, etc-- great stuff. I really like the new intercooler piping that has the heat cores-- too cool. "

"Your website is a life saver, i would have spent double this at my local performance shop. "

"Thank you Cody I appreciate the great customer service and great communication with quick response. I have ordered from you previously and will continue to buy from you guys based on the pleasing and painless transactions. Thank you."