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

"My order needed a slight change and the sales team was quick to make the adjustment. once it shipped the whole order only took about 3 days to deliver 1000mi away. The parts are very good quality "

"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!"

"Thank you again for your help, I really appreciate it and that's why I keep coming back."

"Thanks for your great products,I gained app 40 to 50 hp from stock intercooler to type 14 with no other mods. App. 5 mph [on a jetski]"

"You guys kick so much butt! Thanks again"

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