so is a 2 1/2 inch too loud???? Will it sound alright on my EA?
It's not so much the size of the exhaust that will determine if it's too loud. Besides, too loud is a matter of opinion, anyway (I don't think there's any such thing as too loud!!!). What will determine the volume more is the muffler type and number that you use... With one high-flow muffler it'll be VERY loud, a turbo or super turbo muffler won't be quite as loud. If either of these options are too loud then you can add a hotdog (reduces volume, but retains deep note), a resonator (reduces volume more, but loses some of the note) or another muffler (reduces volume a lot, but note starts to lose some of it's performance growl).
Hope this helps.