Got to say its one of the best mods I have done so far. For those of you fighting traction getting these simple 3 mods will make a world of difference. MAC has really improved there arms, coated with a very purty red color now. Before those mods I could spin the tires very easily on the 1-2 shift now I can barely chirp them. SFC's really tightend (sp) up the car. Not sure how much the SFC's really affecting the launch but made going around the twisites alot more fun now.