So you are saying your 305 700r4 car went 175 mph? Cause your car is making less then 300 hp especially on that stock computer management a "chip" that is actually a prom can only do so much. My car made 380 rwhp and it was lucky to be in the 160's with a 6 speed and it took awhile to get there. With 3:42 gears and a 700r4 which you would have to do it in d so it would be a 1:1 ratio you would have to be at well over 6500 cause at 6k with a tpi setup you are well out of steam. At 6k with 3:45 gears and 28" tall tires you would roughly be at 142mph
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2000 SS Procharger
98 Z vert turbo
07 TB SS cai catback and tune
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