By Chris from Boise, ID on 03/30/2008
Pros: Some throttle response is noticed, it does pull noticeable more on the top end. Put a better exhaust and tune your A/F mixture and you'll have sweet machine.
Cons: A little pricey for a stand alone upgrade, will make your bike run a little leaner stock ECU tuning advised but not needed.
Comments: Great product overall, Factory Pro really did their R&D with these, Combine them with other Performance upgrades you will definitely feel a difference in your "butt" Dyno.
3 of 4 people found this review helpful.
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