Sourcing Small Dia. Stainless Tube?

[TresCuatros]

I'm building a new exhaust for a small displacement engine and having trouble finding decent prices on 25mm ID (~1") ID tubing. Most places will sell 1" or 1.250" OD tubing, and I'm left somewhere in between.

Are you buying tube line-to-line or resizing somehow to fit the preferred diameters?

 

[irk miller]

Do either the OD or ID need to be exact? I've seen it thick wall with a 1" ID, but it's 1.5" OD. You can get flow tubing which is 1.01" ID and 1.25" OD. McMaster sells it all for reference, but if you get it from them it will cost. Most of my metal suppliers near me that sell tubing only sell 1.25" stainless tubing @ .065 wall thickness, which is about 1.125" ID

 

[TresCuatros]

The ID is pretty crucial but the OD I can fudge .100" or so.
I'd like the ID to end up at .970 +/- .020. If it's under sized, I can get an expander. If oversized, I'll have a lip I'll need to address with the porting tools.

It's for a small bore two-stroke exhaust, so it's highly sensitive to both the diameter and the header taper before the diverging cone.

 

[doc_rot]

1.125" OD x 0.065" Wall x 0.995" ID Stainless Round Tube 304 Welded | Online Metals

Order 1.125" OD x 0.065" Wall x 0.995" ID Stainless Round Tube 304 Welded stock today on our website. Buy online with fast shipping direct to your door.

www.onlinemetals.com

if you need it smaller than that you can split it with an angle grinder pinch the kerf together and weld the seam. pie cut for bend or sand bend.

 

[pidjones]

Sounds like something the food processing industries would use.

 

[cxman]

i buy from a place called metric metal or parker steel check with them they have a lot of shim tubing and multiple size tubing

Metric Sized Metals and Steels | Metric Metal | Parker Steel

We specialize in metric sized bar, tube, sheet and more. We offer Carbon and Stainless Steel, Aluminum, Copper, and Brass for a range of industries.

www.metricmetal.com

 

[TresCuatros]

After a few weeks of ordering this and that from various places, I'm finding that McMaster Carr ends up offering the best options with low lead time. Otherwise ebay has good deals.
Anyway, thanks for the help.