In need of 115057 pipe from check valve to catalytic converters

Hello,

I’m searching for the 115057 “Y” pipe for the air injection system that goes from the check valve to the catalytic converters (1981 308 GTSi US). I’ve found it listed on a few sites but with no prices.

The valve and threads are fine but the threaded top of the pipe has been cut off just after it splits off and goes to each converter. The rest of the air injection system is intact.

Are these available anywhere, or are they basically unobtainium?

Thanks in advance for any help provided.


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Would someone have a pic of the actual installation in a car? The photo above seems to show that the threaded end of the pipe might mount to the corner of the engine block, while the photo below doesn’t seem to show it mounted to anything.

 

Disregard; I see that it bolts to the frame.

 

I’m almost afraid to ask what even a used one is worth, but I need to do something. My tubes are cut right below where the check valve attaches.

 

Sadly that is a skill I never learned.

I’ve considered having an exhaust shop fabricate a way to join the tubes and add a check valve.

 

Yes, I assume that fabrication shouldn’t be too difficult if I can find the right shop to do it. I’ve still got most of the tubes (all the way to the cats). Fabbing a ‘Y’ and adding threads for a check valve is certainly easier than making the whole assembly from scratch. Check valves are pretty generic and available everywhere. I don’t really want to leave the car with anyone, though.

 

Brian,

How much would you like for your used one?

 

I was able to get under the car and remove what’s left of my tube assembly. It was surprisingly easy to remove (no heat or penetrating oil required). I’m trying to figure out how it got to this point; the tubes appear to be cut before the ‘y’ rather than corroded apart, and the threaded end is missing altogether. The tubes were open on one end and the check valve was hanging from the hose on the other. In any case, now that I know it’ll be a straightforward installation, I’m on the hunt for a used one.
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In the meantime, now that the pipe’s been removed, I wanted to plug the ports on the cats so I could continue to drive the car. Since the pipe was already in 2 pieces it was easy to remove one of the retaining nuts. I took it to the local hardware store and found brass caps of what I thought were the same size. When I got home, though, the caps fit only one of the threaded cat ports (the pitch seemed fine but the major diameter of the threaded section of one cat was a tiny bit larger than the cap). I got one of the brass caps to fit one of the cat ports, then cut a piece of stainless to cover the hole in the retaining nut, inserted it into the nut, and installed it on the other cat port. If it weren’t for wanting to save the existing tube in case I have to have it repaired, I would have just cut the tube to remove the other nut and used it (with another stainless insert) to cap the 2nd port.
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