Well, I bought my 3" magnaflow catback (that is the LT1 93-97 V8 catback, yes I have a v6) for $320, and a magnaflow 3" cat for about $35, and installation for both (plus an oxygen sensor bung and an extension pipe [replacement cat shorter than stock] was around 200 or something. My guess is that they're just going to get you a magnaflow muffler and install it, it is not worth it to just get a muffler, get a whole catback.
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97 Camaro -
2.077 60', 14.745 @ 92.20 - still down, one year later.
194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies
179.75 RWHP, 204.52 RWTQ
ON ITS WAY:
MORE
R.I.P. Andy
87 Benz 190e - DD
01 EX250 - still gotta get my license for this thing