Did the facelift's to date come fitted with a twin inlet, i know the first gen st220 had them, haven't you gotta watch for deep/standing water as i believe one inlet has a very low intake height..am i right or wrong..cheer's.Only the 220 has a twin inlet air box. The TDCI doesn’t need one as it has a smaller lower revving engine.
Oiled filters have a sweet spot, too much oil and they restrict flow and may contaminate
MAP or MAP sensors etc. Too little and it will not filter properly.
Received a free K&N Filter for my car, sold it on here.
If you want a filter that does its job then get a decent quality paper filter and check it
every 6 months or so depending on mileage. If its dirty then swap it no matter how
many miles you have done.
Think the ST airbox will have a cold feed and twin inlets to flow more than the lower
spec cars. Its not restrictive.
If you want a filter that makes more noise and not bothered about its efficiency then go
aftermarket panel or cone.
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