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

"I recently bought reducers for a modified intake. Units fit perfectly, which made the job much easier to complete. "

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"Thank for quick and easy solutions to our silicone needs. Your website is so well designed and everything is easy to find it only took us 3 minutes to find everything! Keep up the good work guys!"

"looking forward to trying your products.haven't dealt much with an fittings and i hope that if i have any questions your company can help me out.your company came well recommended by some good friends of mine."

"WONDERFUL! Shipping is blinding fast! The site is great because there is an automatic inventory counter to tell you what is in or out of stock. Great site! Ordered from them several times without a hitch at all. And not to mention that their prices are CHEAP! "

"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!"