a lighter fly wheel is not a good idea if you have trouble with the stock setup ... the revs will drop much quicker between shifts ... and that seems to be the problem some people are experiencing as is, the shifter on this car requires massive precision to get the car to accelerate smoothly and at full potential ...

i would say a higher quality shift **** that offers more weight as a counter weight would be the best modification available right now... that and plenty practice... i've driven cars with 4 times the power (few 700 hp drag cars) that are easier to shift than my stock Xf...