Info on KB4 Pipe?

[garlandkart11]

Anyone have any info on a KB4 pipe? I acquired 1 and was going to use on a vintage project, but need to know what engine's it is good for. Thanks Bobby Garland Jr.

 

[flattop1]

When i got mine i was told yamaha .
My list shows a kb5 as low end just yamaha on the-4

 

[garlandkart11]

Thanks. It looks a lot like a 80's-90's Blimp pipe.