Installed the APEXi SMART Accel controller last night on the IS-F.
A quick and easy installation (took about 10 minutes) and the selection button conveniently mounts in one of the blanking spots on the dash.
The verdict? A must to help with the lag on the standard drive by wire system. Throttle comes on harder and sharper on purple and red modes and makes it very simple to lay big lines down the road if you have a lead foot!
LEXUS IS-F 