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

What Our Customers Say

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"I purchased a slimline radiator fan from this website. They had the best price available by far. The fan worked with zero issues."

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"you have an excellent website.Yoy have really expanded since I first ordered. I have told several of my friends at dealerships about you. Say they have passed this on to friends who were impressed."

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"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"

Customer Email

"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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"that will be ok i love the service i got from your company yal rock... i will tell all my hot rod friends about your service ,i just got my car done today and it runs very good thanks jerome..."

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"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."

1.5" Parts

1.625" Parts

1.75" Parts

2.0" Parts

2.25" Parts

2.5" Parts

2.75" Parts

3.0" Parts

3.5" Parts

4.0" + Parts

Schedule 10/40

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Silicone Couplers

Air Filters, Tools

AN Fittings

Aluminum Radiators

Pumps, Fans, Gauges

Clamps

Aluminum Intercoolers

Blowoff Valves

Thanks for visiting! Here's a quick checklist to help you make sure you're getting the right pipes for your installation.

Make sure your pipes have mandrel bends!
Our aluminum bends and stainless steel bends all have mandrel bends*, which are far superior to the press bends that some retailers sell. Mandrel bends maintain a uniform inner diameter through the bend, unlike press bends which are easier to manufacture and get smaller in the bend. This means that mandrel bends flow better and can be cut and welded on the bends.
Make sure your pipes look great!
Our aluminum pipes and stainless steel pipes have an incredible mirror-polished finish*. A lot of installers cut corners here, but why bother when our prices are so low for show quality products?
Make sure your pipes are the right size!
Our aluminum pipes and stainless steel pipes are listed by outer diameter*, as is typical in automotive intake, exhaust, and other piping systems.
Make sure your pipes are the correct material!
Our aluminum pipes are 6061-T grade*, with good weldability, machinability, corrosion resistance and light weight. Our stainless steel pipes are 304 Stainless Steel*, with excellent rust resistance and easy welding to many existing components.

*Information refers to our main product line - some products may vary. Please check our product descriptions for full details.