Because the 3100 did incredibly well in the relatively heavy 96 Beretta/Cavalier, so they figured that the GPSE wouldn't be much different. Relatively meaning for the engine. When comapred to the GP, the Beretta was a featherweight, coming in at: GVW: 2,980# FAW: 1,880# RAW: 1,900#
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.