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

"hi, just thought id let you know i have recieved my order, and am very happy with it, and extremely impressed with your service. i have passed on your good deeds to a few freinds who will be buying water to air intercoolers and other accesories very soon. cheers"

"Hi, many thanks for your help. Great customer service :) .. as good as your products Have a great Friday Cheers"

"I ordered intake testsers and was able to find the leaks that Ford couldn't. The silicone vacuum hose works great!! Thick walled no collapse, a RARE FIND!!"

"WONDERFUL! Shipping is blinding fast! The site is great because there is an automatic inventory counter to tell you what is in or out of stock. Great site! Ordered from them several times without a hitch at all. And not to mention that their prices are CHEAP! "

"Keep up the good work,"

"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!"