According to what I've gotten from Pulley Boys, Eaton, and Magnusson, the 2.5" is the ideal for the 94/95 performance pulley. I don't know about the 2.4". I personally wouldn't want to buy it only to find out it hurt performance. If you DO, build a helluva insulated CAI, and insulate your intake tube. Maybe even ceramic coat your exhaust manifolds, and put an extra heat shield over the crossover pipe. You're gonna need it!

WOW thanks for very fast response, I do have my CAi insulated but have done nothign to the manifolds nor crossover pipe , I did plan on having them cerami coated later . I also plan on nos within the next few months so probably no more boost needed. thanks for your time and response