or just take it to the dealer and ask them for a copy of the vehicle manifest, that will tell you everything that your car has/had when it rolled off the assembly line. don't know if it costs anything or not, probably does
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98 GTP GMPP handling kit, HomemadeFWI, MSD coils, Taylor wires, 180 drilled tstat, TR6IX plugs, Intense STD PCM, JimmyC DP, Thrasher shift kit (mild setting), AGX/Intrigue spring setup, drilled/slotted rotors with Hawk HPS pads. Hopefully more to come