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"Thanks for the great customer service! I'm planning on ordering from you again soon."

"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."

"[RE 600HP Water/Air intercooler kit] This is the best intercooler setup you can run on a dsm. It was better than any FMIC I have encountered. "

"Hi just to let you know that i have receive my order, and the only thing i can say is WOW ! ... THe product is simply amazing and look great, thank you so much for such an easy transaction, i will come back for sure !! Thank and have a nice day !!"

"I've been ordering a bunch of stuff from you guys lately. Everything has been on point! Big Thanks!"

"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!"