The 4.1:1 conversion on the 4/4 is a fabulous modification. Really changes the whole character of the car.
4/4s always used to have 4.1:1 back axles, i think they might have gone to 3.7:1 to standardise with the rest of the range, but to my mind there's absolutely no doubt that 4.1:1 is the perfect ratio for a 4/4
