i have a 97 mazda 626, automatic tranny, ive been on Ebay looking at performance chips. I found boss and rsc performance chips their claims are way to good to be true i realize this but do they do anything at all even 15 hp boost?
Number one, they don't do much. The claims tend to be grossly exaggerated.
Number two, there is no free lunch. Any increase in performance shortens engine life. Some chips do quite a bit of damage for the small increase in performance they give you.
Number three, I have no knowledge of the chips you're looking at.
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