Flowmaster?
 

I want to put a Flowmaster "American Thunder" exhaust kit on my stock '98 GT, I want it to sound cool but not too loud. Do you think this system is too loud for my car?

If your running stock cats that I say it will be perfect for you.

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00 GT, MAC Offroad H, Steeda Pulleys, Steeda Timing Adjuster, FMS 4.10’s, Flows w/turndowns, UPR shifter, UPR subframes, UPR LCA’s, Air Filter, Lakewood 70/30 & 50/50, Weld Pro Stars, Nitto DR’s, 253.8RWHP/292.8RWTQ
Best on DR's 13.09@103.92 (1.81 60ft)
Best on ET Drags 12.99@104.60 (1.67 60ft)
M/M 100
88 LX coupe X-FHP, 12pt Cage, UPR K-member, 31 spline rear, full spool…