I would imaging that going from 3.27 to 3.55's would not be a big jump. I imagine 3.73's or better would suit you. If you had 2.73's then even 3.55's would really wake the car up.
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White 1995 Mustang GT
Dynomax Cat-Back, Offroad H-pipe, K&N Filters w/o Air Silencer
My 1995 Mustang GT
