It even made the diesel sound a bit more throaty!! Well worth the ?36 or so, have a look in another thread titled Green Cotton Panel Filters and there are contact details for a fella @ Demon Tweeks, top bloke, good price amazing delivery!!
if you're talking about panel filters then i think the Green is considered to be the best for the mk4 because it is not oily like a K&N. But if you mean cone filter then i would go with a carbonio or evo cai.
It wont give you a VTEC surge of power or anything like that but it does allow air to move better which is much better for the engine as a whole. On the cosmetic side it does sound much better and less like a hairdrier than the engine does from stock.
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