12 1/2" long 8" to nipple was told it was a PMP, then told it wasn`t. Anybody know??

I can only give you 50% of your answer; it is not a PMP pipe. For several years I was a PMP distributor and I can confirm that your pipe is not one that was commercially distributed in the USA.

I don't know what brand of pipe that you have there.

That looks like Jet Hangar Hobbies' F-4 Phantom twin-exhaust pipe.

Nope, I have a JHH F4 w/ JHH dual outlet pipe and it definitely doesn't look like that.....

Peter

Looks exactly like the pipe I got with my Spirit Jets F-18 back in 1989 from Pat Grubbs at the IMS show. Don't know where he got them from. Didn't last, I blew one of the stingers off within 20 or so flights on my .65. I believe there were two sizes, one for .45 size and one for .65-.91. When I later talked to Pat, he thought maybe I got the smaller one. Best I remember, was a long time ago.

It might be an Eric Mey's Pipe for the A6 intruder. ???????????