pro-circuit 304

I recently bought a used exhaust for my 2000WR and was told it was a "pro-circuit T4", but its actually a "pro-circuit 304 factory sound" system, meant for a '99 YZ.

Is it still ok for my bike?



I've got the same 304 system on my 99 WR400. It works great but no better than any other aftermarket system. Unfortunately, Procircuit does not offer a spark arrester for the 304.

I made my own SA so it now passes the "stick test".

I tried to fit other manufacturers exhausts (FMF, WhiteBros, etc) to the header, but the 204's header angle does not match up.

Hope this helps.

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