4 pots are nice to have. The 4 pots alone won't get rid of all the mushy pedal feel in the RS but it will help. If you really want to get rid of the mushy pedal then you will want the caipers, slotted rotors, quality pads, SS brake lines and then get rid of the terrible factory brake booster (may require a new master cylinder pending on My of car). For the short time I had my WRX I liked the brakes on it. Hell I loved em! No mushy pedal and when you get on the brakes it could reign in the car without any fade or time to think about it. I was also only using them for street use and I had the stock 4 pot rotor size. It also allowed the car to use the stock 16in wheels it came with. I got some nearly brand new 4 pots off of a Scoobynet member who replaced his on his new P1. I haven't had a chance to mount them to the RS but I am looking forward to it. I wish I could have taken parts off of my wrecked WRX but it became property of the insurance company and I never saw it again.