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i have a set of these ufo's. who has them and do they work as good as they are advertised to do?

http://www.thunderproducts.com/u_f_o.htm

here is what they say they do

* More horsepower with less fuel
* Broader power band
* Explosive throttle response
* Superior fuel atomization
* Less sensitive to temperature, altitude and jetting changes
* Cleaner emissions
* Cooler running engine

$90 is it worth it?

i got mine for free when i bought my motor. just never put them back in it.
 

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ive never seen that much improvement out of them in any of the sleds that have had them in the shop. and the same can also be said for those boost bottles. just tune your carbs and sync them and you wont need any of that stuff
 
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