Where is the cheapest place to buy magnaflow catback?

Well after going to the dyno and finding out out what i am putting down the guy there talked to me for a while about my car. One thing he said was he noticed the flowmaster mufflers and the stock catback and said im really holding back on power there he suggested a magnaflow catback. Now while most ppl think flowmasters are loud me personally it does not bother me however it would be nice to get something with a diff sound than every other 5.0 in my town. Just wanting to know would i pick up much power by swapping catbacks to a magnafow one. I do plan on getting a powerdyne blower in the future and he said if i ever do that the flowmasters would hold me back alot more. Is this true u think? Also i wanted to know where was the absolute cheapest place to buy a maganflow catback new. I have seen some ppl say they get them for like 350 shipped and all. thanks.

PS if anyone has an audio clip of a 94-95 with a o/r h and magnaflow exhaust please post it so i could hear it

i dynoed 254/291 but my mail order sct chip had me running way rich like 11:1 so i coulda squeezed out to about 265 or so they said had been running around 13:1 but i did not wanna getr a reburn and then have to do it again when i put my powerdyne blower on.