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

"Just wanted to say thank you. I have ordered from you guys 3 times now your shipping time is very fast, and the product is very accurate as well as high quality."

"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]"

"[Thanks] For a great product. Huge improvement over the stock fluidyne. Unbeatable price too. My truck never ran better."

"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!"

"Awesome quality, good packaging so no damage and they arrive sooner than expected, awesome site. thanks "

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