JamesMcD
JamesMcD SuperDork
3/16/21 12:31 p.m.

I'd like to build my own exhaust. I have a source of pipe and I can weld, but need help finding a good source of exhaust flanges of various shapes. As is often the case lately, Google is working against me rather than for me. Surely there is a place that supplies flanges of various sizes and bolt patterns (I'm not talking about the manifold).

 

Thanks.

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
3/16/21 12:37 p.m.

I've built a couple of exhausts by taking a factory manifold and cutting the flange off. Only works if it's a tubular style manifold and not cast though. I also built one for an LS engine using an easily sourced flange, but, well, LS.

What engine? Anyone with a waterjet can cut one for you if it's weird, there are at least two possible sources in my little ranch town. Probably more - the offroad shops tend to have cool tools.

Paul_VR6 (Forum Supporter)
Paul_VR6 (Forum Supporter) SuperDork
3/16/21 12:55 p.m.

They are usually very engine or brand specialized. I get them made for my engines cut locally because no one makes them in masse. 

What's the setup?

1SlowVW
1SlowVW HalfDork
3/16/21 1:12 p.m.

If you're just looking for basic 2 or 3 bolt clamps for 2 or 2.5 pipe any auto parts store can get cast or stamped ones from walker exhaust or other suppliers. Check the walker catalog. 
As others have stated the head flange could be a little more challenging depending what you are working on.

FMB42
FMB42 Reader
3/16/21 1:35 p.m.

Yep, Walker might be your best choice. Things being so darned specialized these days can make it tough to fab stuff out.

David S. Wallens
David S. Wallens Editorial Director
3/16/21 2:39 p.m.

Burns Stainless offers them in stainless. 

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
3/16/21 2:42 p.m.

My bad, I missed the "not the manifold". 

Drop by your local exhaust shop. They'll have a wall of flanges. They may let you borrow some and you can certainly play around. 

Me, I like band clamps. Easy to R&R, adjustable for both length and rotation, easy to use, low profile. 

Tom Suddard
Tom Suddard GRM+ Memberand Director of Marketing & Digital Assets
3/16/21 2:47 p.m.

I've had great luck finding flanges at Summit Racing. Their house-brand stuff works great.

Shavarsh
Shavarsh Reader
3/16/21 2:48 p.m.

In reply to Keith Tanner :

I've just started using band clamps, they are a real upgrade over the U-bolt clamps

DjGreggieP
DjGreggieP HalfDork
3/17/21 11:10 a.m.

https://www.walkerexhaust.com/products/light-vehicle/accessories-hardware.html

You select their 'gaskets and flanges' and the PDF file has everything listed. Sizing, hole spacing and part numbers. 

 

Stefan (Forum Supporter)
Stefan (Forum Supporter) GRM+ Memberand MegaDork
3/17/21 12:40 p.m.

Columbia River Mandrel Bending sells some flanges among other things:

https://www.mandrelbends.com/flanges-gaskets.html

JamesMcD
JamesMcD SuperDork
3/19/21 10:59 p.m.

Thanks guys, you gave me some good leads.

stuart in mn
stuart in mn MegaDork
3/19/21 11:54 p.m.

Speedway Motors is another source for exhaust parts.  https://www.speedwaymotors.com/Search?query=exhaust%20flange

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