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Discussion Starter · #1 ·
Thoughts???

unless you have had some engine modifications to allow for it, you
_will_ be down on power (maybe more power than the stock, but less
than if you used "tuned" pipes). Engines are built to compensate for a
certain amount of back-pressure (i.e. the valves opening a little
earlier), and if you remove the backpressure, the valves will be
opening too early, letting some still-burning fuel into the headers.
... because of this, you can suffer (in extreme cases) from burnt
exhaust valves if you hammer it too hard
 

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i know that what you're is correct in some cases. the guys doing these exhaust mods are getting really good results, though. the best people to query on this matter would be JR, lamonster, or perhaps Hal. i would start with JR; he builds race bikes and such. he would know the most.
 
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