What is the F45 option? I have a Blk/Blk LT4 Vert, under 32K, 2 power sports seats, Bose Gold Stereo with CD and Cassette, LTPWS with Goodyear EMTs, completely stock except for K&N filter and CAGS eliminator. If Z51 is the handling option, it does not have that. Oh yeah, and I have a hardtop...