Not knowing EXACTLY which 2007 you have, you can read mapnotes here...http://www.accessecu.com/accessport/.../Z_Series.html
It appears the rev limiter is raised 500RPM, some cars use that along with the gear to limit speed, yours "may" use the speed sensor.
86 FZ 750
98 Legacy GT Wagon, silver (orig. owner, 155K miles)
*COBB - full exhaust (incl. EL coated header), SS, shift bushings, F & R STB's, rear bar, stage-2 DOHC heads.
-Non-COBB - 99 RS 16x7 rims, 225/50-16 P Zero Nero M&S, ACT clutch, Exedy LW F-W, Grimmspeed intake spacers, SS brake lines, modded WRX rear bar mounts & a Crawford STi NA SB.
99 Impreza L Wagon, silver (Wife's, orig. owner, 156K miles)
*COBB - F & R STB's, shifter bushings
*Phatstud..05/08/1980-10/19/2010..we will miss you.