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 "

"Loved your last products. Very well made. Welds were superb on the steel tail blow off valve flange."

"Fantastic Prices! Best I could find, bar none! Thank you!"

"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!"

"Thank you so much for the prompt service. Your silicone couplings, lengths etc. are second to none, great quality and the t-bolt clamps are top notch. Thanks for the help on my GTI-R swapped 91 sentra its really quick."

"Its great dealing with small companies like yours that still take care of their clientele."