Cut one and a half coils from bottom of spring on each side for increased stiffness and level rear ride height. Remove stock wheel spacers for proper positioning. I have tried many brands with Dunlop and Yokohama providing the best performance per dollar. Bosch fuel injected 2 liter with the following changes. Balanced to 10,000 rpm.
Horsepower is marginally better while torque is substantially increased.
Abarth 131 Sport shifter and console for tight, quick shift pattern.