Not trying to start a flame here and maybe this was just a mutant car but a friends gf had a 00 ws6 auto and it ran 13.2's(not sure about mph) all day long with only K&N and borla.
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92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe
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