Re: Which Performance Air Filter?
Well I've recently replaced the standard 147 air filter with an autodelta one and I've noticed the difference. The engine seems to be more free reving - especially in the 5k - 6k range. Although before I bought my car and before an Alfa dealer serviced my car, I suspect the air filter would have been an autodelta one anyway - unfortunately thrown out by the dealer on a service! It matches with the autodelta carbon air box system. The autodelta one is a much thinner one without the paper folds, only having 2 types of foam filtering - it is cleanable so should last for years.