i have a 2jzgte sc300 5 spd with vpc, bcc, fcd, bov, down pipe, clutch, exhaust, hks smic. i have gone to the track and clock in a dissapointing 13.9 et @105mph @ 20psi. i would like to get my car down to the low 12 sec ets. can anyone suggest what parts to buy? ex. LSD (i have a open diff)...... i alreday have a fmic, boost cont. and cam gears ready to install.