P2M shifter return spring kit for SR20DET/KA24 transmission provides 6 combination of shifter return setting. The stock shifter spring found in stock transmission often can be described as "too soft and sloppy". P2M shifter return spring kit provides harder spring combination to replace the stock shifter spring (found on the sides of the transmission). By stiffening up the shifter return can greatly improve drive-ability and shift time on the track.