i was thinking about something kind of similar to what you were talking about there, but instead of the 440 pipe i was wondering if an xc500 pipe would fit onto a 500 fuji engine?? if anyone knows anything please tell me.
the xcr 440 stock pipe is a little hotter than the indy 500. makes a little more hp. seems like the pipe you have there is the stock one with the sidedump silencer removed, i have the same thing done with my sled with an aftermarket canister exiting through the side.
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