different frames and I'm pretty sure a different engine. The F3 to F4 was the big change. Prior to that the engine and frame were common between the F2 and F3. So the likelyhood is probably somewhere between slim and nil.
you can make any exahust fit, you just have to custom make a mid pipe... witch isn't something i would recomend unless you have tools to do it. I know some f4 pipes fit my f4i. it is all about the mid pipe and the location of clamp that fits onto the passenger peg thing.
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