Stock should be 65mm which is more than enough for a 96-98 GT. It can support plenty of horsepower. There are people with 99-01 GT's that lost power with a bigger throttle body. Usually most 99-01 guys don't change out the throttle body till they put a blower on the car.
I've seen the MAC throttle bodies as cheap as $140 but remember unlike the FRPP throttle body it does not come with the TPS sensor it has be swapped over from your stock unit.
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00 GT, MAC Offroad H, Steeda Pulleys & Timing Adjuster, C&L 80mm, 4.30’s, Flows w/turndowns, UPR shifter, UPR Pro Series LCA’s, Lakewood 70/30’s & 50/50’s, 253.8 RWHP/292.8RWTQ
Best ET 12.91
Best MPH 105.49
M/M 100, 7085
2001 Mod Motor Shootout 2V NA Champion
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