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

"Best prices anywhere! Thanks!!"

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

"Hi Dana, Thank you for the great customer service in upholding the in-stock guarantee! I will surely be buying my intercooler set-up from yall. Best, Ryan "

"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!"

"Now this is service!!!, item shipped within a hour of ordering!!! I own a shop and will be passing your info on to anyone I know."

"My blue silicone vacuum hoses i ordered from you in 2008 still look brand new today.Great hoses.Thanks "