I have one, they are a tad better then the normal ones. You dont get any roar, but you do get a little better throttle responce, but I cant say for petrol engines.
Donnylad you dafty, the 57i is a load of goat balls - I'd recommend the panel filter everytime as the cone filter will eventuallt lose you power. If you want a come filter get an enclosed one like the BMC CDA.
i had one on my 1.2, imo i could tell the diff, whereas my wife thought i was mad spending 40quid on a filter that "had made no difference" again its just down to personal taste.
my car had a better pick up and as for a roar my brava sounded better than the bmw 1 series im driving about!!
Fiat Brava 1.2SX Formula
Fiat Brava 1.4s
Fiat Marea Weekend 2.0
i must buy another fiat may be a bravo?
"my wife thought i was mad spending 40quid on a filter that "had made no difference" - It might be £40 on 1 filter but then you don't have to buy a paper one every year, only wash it