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

"Thank you. This is a sign of a good business, keep up the good customer service."

"Z69F6o I'm not that much of a internet reader to be honest but your blogs really nice, keep it up! I'll go ahead and bookmark your site to come back later on. Cheers"

"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!"

"Dana B and sis.com [1], Thanks for the solidly good customer service. I look forward to getting my order. -S. P. Henry "

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

"cold air intake for my civic at 1/4 the price, and 10X the looks"