mhayes462

This is a ProBoat tuned exhaust and it is a no band pipe that is water cooled. And it is a different style WTC header. I figured if Proboat uses them they should be good or do they just put junk on their boats? I want to put this on a Zen 260. Any input would be appreciated.

SS RC Boats

You will be better off using a WTC header from a different manufacturer.Is that what you really want?

glennb2006

Hard to tell from the picture, but with many wrap to centre, and also wrap forward headers, it is difficult (impossible) to get the correct optimum tuned length. They are too long.

Glenn

mhayes462

Here a couple more pics. From the center of the flange opening to the end measures 7 3/8". Its not exactly what I want, but I had it lying around and it will work well in my challenger hull because the pipe cutout in the back is in the center of the hull.

Dan S

it still makes it a pretty long header.

at 7 3/8" for the header that leaves you 5 to 6 inches to the fattest part of the pipe.

Dan.

mhayes462

couldnt I just cut some off the end?

Dan S

eventually, yes.

but like the guy's are saying, wrap around headers are a bit finicky when tuning.

Dan.

mhayes462

This one is a little different though. It doesnt have the sharp bends like the other ones. It goes off the intake up about 90deg and and then it has a much smaller curve.

G Doggett

That first 90 degree bend at the flange is bound to limit performance.
Exhaust gas and sound waves can cope with extremely tight bends so long as they are smooth and even , but a sudden 90 degree change in direction is a no no.
Graham.