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

"i have their W2A ic core/ice box/pump, i got some tbolt clamps and couplers, also a 3" vband clamp with fittings. All very fast shipping and everything is perfect thus far."

"Thank you for having the best prices that I can find. I have looked for hours on line and spent hours going from auto parts house to parts house and you have the best prices around."

"Thank you for the quick response. I've had nothing but good service in the past and will continue to be a customer in the future."

"Rattling great visual appeal on this web site, I'd value it 10. "

"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. "