Re: Factory Filter vs K&N Filter
There isnt a direct fit kit filter for the Alfa's that makes any differnece, most have poorer filtration, can foul the MAf with oil, leave you prone either to sucking in hot or sooking up puddles.
The Apexi filters are the exceptionm but they dont do a kit, you have to alter the intakes to get them to fit.
Dont waste your money, in the days of carburettors, maybe.
All turbo diesels fuel up in a surfeit of air anyway, so unless you are mapped to expect more air, forget it.
I have designed a lot of engine intakes, these things are usually snake oil, the filters job is to well.....filter!
Would you consider a coarser oil filter to reduce the windage in the engine?????