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."

"Hi Dana, Thank you for the great customer service in upholding the in-stock guarantee! I will surely be buying my intercooler set-up from yall. Best, Ryan "

"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!"

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

"My blue silicone vacuum hoses i ordered from you in 2008 still look brand new today.Great hoses.Thanks "