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 "

"Free shipping would be cool =p But seriously- You guys are awesome. Good experience and quality, time after time. Thanks for the great products for awesome prices."

"Thank you Cody I appreciate the great customer service and great communication with quick response. I have ordered from you previously and will continue to buy from you guys based on the pleasing and painless transactions. Thank you."

"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."

"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. "

"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!"