is it worth going from a 97 mustang gt with intake, exhaust, and pi heads to a 4v cobra or would it be a waste ? in terms of power i already know that the 4 valves respond to bolt ons better but just wondering if it was worth the upgrade. I plan on buying one soon and I need to know if it will be that much faster than what I have. ive heard mixed reviews and i wonder to myself if i should just wait and get a terminator or what.
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