I am going to have my exhaust built in a couple weeks or so, my exhaust is going to take the stock fiero route, I was wondering if I should use a resonator and if so what resonator should I go with? Exhaust is going to be 3" back.

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86 Fiero GT 4spd - L67 swap: VS cam, GenV. Needs exhaust (ETA 9/13) Build Progress
98 GTP - Some mods

Depends is you want it loud or not. Most people do NOT use a resonator. Seems like most use a 3" magnaflow muffler which I believe gives it an aggressive but not obnoxious sound. I can tell you from experience that if you want it quiet with only the scream of the supercharger, a stock 99 camaro V-8 muffler works well.

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84 NB, 3800SC, E-85, VS Cam, 3.0 Pulley, 4T65E-HD, HP Tuners, AEM Wideband, Regal GS Gauges, S-10 Brake Booster. 1/4 mile -12.05 at 111.7mph

HMM.... Will a Stock 1999 Camaro Muffler actually "FIT" where the stock Fiero muffler was ? or does the trunk have to get cut ? Thanks

a few inches off of the very bottom of the trunk have to be removed and a new floor put in. Then make a heat shield to keep the trunk carpet from catching fire. Again, only use a camaro muffler if you want it quite. if you want it loud, use the magnaflow or something similar.