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

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

"Hi There, Nothing to say but AWESOME! Thanks for your great service and really really fast shipment. I'll pass your site on to my friends."

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

"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!"

"Your products rock! I really enjoy your stuff, it makes building a car so much better. All the angles, bends, sizes, etc-- great stuff. I really like the new intercooler piping that has the heat cores-- too cool. "

"I've been ordering a bunch of stuff from you guys lately. Everything has been on point! Big Thanks!"