how fast do you guys think a 87 250x is with an 86 350x motor in it?will i fell a power increase with a supertrapp pipe?

 

I have a 300ex(same frame) it runs great with a 350x engine. A stock 300ex won't touch it. The SuperTrapp should help,but Powroll sells an exhaust system that might work better because it is built to fit this particular combo. It is about $350.