The header is what gave you the horsepower. You can grind the welds on the stock and get a little. The tip is nice but very minor improvement. Ive done all the cheap stuff and all together I am up from a 145 main to a 150 main. I could probably run down at 147.5 also. The 145 now is very white so I definately leaned the motor with the intakes. Micture is at 2.25 and I added a 50 pilot.
just the tip wont help you need to do something with the intake to.i got the tip,kn filter , raise power tube and then rejetted the carb.i did some timed runs on flat ground with the gps befor and after and it really does make a diferance. for a 100 bucks you cant beat it.
We did it when we went to a open air filter and bigger jets, no mucj louder and it looks cool. But with stock you should be fine no need to rejet. I put mine back to stock filter and jets and I have no problems.
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