stainless steel exhaust for S.E. Beck with a 912 616-39 (1968) engine

Since you're one of the few with a real Porsche engine your best bet is probably to check with Carey Hines ( @chines1) for advice. I doubt that there is an off-the-shelf solution for that combination.

While you're looking, you could also check out:

LN Engineering https://lnengineering.com/prod...-tuned-exhausts.html

Pelican Parts: https://www.pelicanparts.com/c...formance/exhaust.htm

Sierra Madre: https://sierramadrecollection....ler-912-65-69-p55673

So then you can either be better informed or totally confused when you talk to Carey at Beck.

Or

PORSCHE 912 SUPERFLOW EXHAUST SYSTEM, CENTER EXIT TWIN PIPES (vintagespeed.com.tw)

Vintagespeed.tw has a Sebring exhaust for a Porsche pushrod 4.

CSP as well. 

Since this is in the Spyder section I am assuming the OP has a Spyder, meaning these solutions won’t work.

It's only been done a few times and there is no "off the shelf" solution.  Not sure what others have done in their home builds, but the ones we did, we took the standard 4:2:1 VW type 1 exhaust and cut off the flanges that mount to the head, replacing them with the rectangle Porsche flanges and custom made stub pipes.  The location of the exhaust ports between the 2 motors is very close, and there was enough play in the VW exhaust to get it to one up without too much work.  Weld it all up and ceramic coat it.

thanks everyone I appreciate the response 

1) yes the car is a Spyder 550 not a speedster

2) I was pretty sure I wasn't gonna find an "off the shelf solution"

3) the existing exhaust is a functional 4 into 1but it was assembled with the front two connecting with flex and clamps, its not pretty and definitely a weakness in the overall appeal of the car/engine. if I were to ever sell the car this would be a strike against it for sure

4) I was optimistically hopping to find a fabricator In my area to build this.  Again, That's eastern Washington State / north Idaho (post Falls, Coeur d'Alene)

5) I appreciate the comments and the the advice, this helps me with a starting point and some possible solutions / pieces to work out the finished product

Thanks again for the help

Steve