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well...
they only work at wot, like when you floor it, they have an on/off switch, so it don't fuck with your settings, like if you took the car in...
it's worth roughly 1-2tenths, and 3-5 mph in 1/4 mile...
i sell em so i know way too much...
i have heard them to be good and bad... i have only seen them to be good though...
and my friend's civic ex did manage the 2 tenth better times as well as 4mph higher, so im not just quotin... they are worth it if you floor it alot, but not noticeable otherwise...
also... if you are looking at comp mods, why are you worried about warranty?
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