Kawasaki 750 x2 exhaust options and opinions

[quin1con]

Looking for advice on the best exhaust. I have a line on a Coffman and a pjs. Wondering which would be best for racing. Price is the same. Current build. 750 small pin. Single 46 with pjs intake. Westcoast exhaust manifold. Hooker impeller.

[StuRat]

pics of both help... several versions of both were made

[quin1con]

pics of both help... several versions of both were made

pictures attached

[StuRat]

I would be concerned. That first picture is mine. I sold that pipe 2 years ago or so. Thats a first gen coffman on the right. Unless you have specifically laid eyes on these in person I would say don't waste your time with whoever it is you are dealing with.

And when I say "mine" I mean that is my photo. I took it. Honestly if you dig through enough of my posts far enough back you can probably find the listing.

[quin1con]

I would be concerned. That first picture is mine. I sold that pipe 2 years ago or so. Thats a first gen coffman on the right. Unless you have specifically laid eyes on these in person I would say don't waste your time with whoever it is you are dealing with.

And when I say "mine" I mean that is my photo. I took it. Honestly if you dig through enough of my posts far enough back you can probably find the listing.

i own the pjs and I bought it from you!! Just seeing if the Coffman is worth the money or not. I can sell the pjs to my buddy if the Coffman is better

[wmazz]

Generally I prefer the Coffman over the PJS. As you probably know
the PJS was designed to make HP at a higher rpm (6750), and the
Coffman at 6500rpm.

The cast aluminum Coffman is a completely different pipe that is
designed for more peak HP and rev out further than any other pipe.
It is also tuned for 6500 rpm, but it is a much better design.

But most Jet Ski engines are not set up to rev further.

That said, the stamped Coffman will have good peak HP, but not
not as much as the cast pipe. The design makes peak HP and
signs off after peak hp like most watercraft pipes.


Bill M.

[fastgtfairlane]

Between the 2 pipes posted in the pics and you own the pj's, I'd run that. You have 2 stinger sections to try and with the 750, I'd definitely go with the longer stinger.