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

"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]"

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

"Thank you for having the best prices that I can find. I have looked for hours on line and spent hours going from auto parts house to parts house and you have the best prices around."

"Just got my order, everything looks great! Thanks."

"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!"