Air filter for turbo

[Nath140889]

What piggy said , about 12 quid from euro car parts, are huge and very free flowing, even appear to have a velocity stack internally, the audi s3 guys run them on cars tuned to over 300bhp and swear by them as a good filter thats not gonna break the bank, cheap enough to be a short time service item too, got one on my a3 and it improved throttle responce and the sound from it compared to a stock air box is unreal

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Also for refference s2000 filter is an 80mm neck