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

"4th time returning customer thanks guys always good service."

"Super fast shipping! High quality tubing as well. So nice to get what I ordered within 2 days."

"This is the only place I could find such a small, specific silicone reducer! 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!"

"Thank's for making the ordering proccess to easy . I few guys I know have brought Water/Air IC of you and have had nothing but praise for you . "