I have 2007 S cab. with auto trans, and I have a terrible throttle lag off idle.
I have been looking at the S/C PULLEY UPGRADE W/SPRINT BOOSTER - R52/53 COOPER S that MinMania is offering. Has anybody had any experience with this?

 

Sprintbooster alone will help dramtically. Do a search on sprint boosters and D-1 spec units. Lots of info on both of these. With the pullley you will have seat of the pants power difference. Again do a search. Good luck post some pics and remember to wave.