Opinions needed...Evo UD pulleys and ipod OR Eisenmann Race exhaust???
On the other hand i could replace my worn out ipod and get the evosport UD pulleys. I really need help here. What exactly to these UD pulleys "underdrive" is it just water pump and alternator? How would this effect the car's performance aside from the 13HP gain? Will it effect the aircon, radio, or other electronics?
Sorry for the long post but i'm really hoping to get ANY help i can here. Thanks for the suggestions.



