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

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

"Just wanted to let you guys know that your site is great and I linked it on one of my local automotive forums. After i get the products in and install I'll more than likely be posting it up on some national/global mustang boards if all goes well..."

"Hi, many thanks for your help. Great customer service :) .. as good as your products Have a great Friday Cheers"

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

"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!"

"I ordered a 45 degree angle 2.5 inch diameter coupler and I want to say I am very satisfied with the quality. Fast shipping as well. Thank you."