Can anyone suggest a good air filter for about 400-500bhp? Ive had a hks mushroom filter on my car since ive got it and its crap at filtering part of its job to be honest.
Im looking for something with a 4" neck and something that does its job good.
suggestions please
A very large k and n filter, they can supply pretty much any size you want, exceptionally good filtration and reusable
That's what I plan to useOriginally Posted by 59bhp
www.greenfilters.co.uk - they do a load of universal ones
I know plenty of people running over 450BHP on Green cotton filters
Cheers for all the replies
Any idea what size they are using? I've been looking on there site and most of the twinI know plenty of people running over 450BHP on Green cotton filters
Cone filters are only about 6" long. I'm not sure on sizing or if it's because the are using the internal surface area too that makes them more effective than the size looks?
what size is the turbo inlet? you only need a filter which has the same surface area as the turbo, however its always good to go a bit bigger to ensure the same bit of filter doesnt get all the airflow and prematurly clogs it.
http://www.knfilters.com/search/universal.aspx is a great wee link, and is how i found mine
No one is using a set size mate, they are all monsters though lol
Some running straight cylindrical, Some running the ones with the opening in the end.
Really good prices too
Whats the power limit of the HKS mushrooms ? seen them on engines claiming more than 450 bhp tbh and their design don't look restrictive?
AEM 100mm neck
there not restrictive in the slightest, they just don't filter much lol
its the same with most foam filters to be fair, pipercross etc
cotton filters are much better at filtering but obviously are more restrictive, so its a compromise (as with everything)
Looks like it will do mehttp://www.knfilters.com/search/universal.aspx is a great wee link, and is how i found mine
http://www.knfilters.com/search/prod...x?Prod=RD-1460
I got this K&N beast from Opie oils, cost about £52 and is good for 850bhp+!!
As modelled by my youngest!
^^^ And they also do some rather tasty sponge pre-filters that slip over them that look like this....
^^^^ looks same as i have on mine but i boxed mine in with a head light feed ,
So another vote for k&n here can get pretty much whatever size n shape you want
I also run a big K&N filter
imo all those jap filters look way too small for very big power.
I also have a big k&n waiting to go on.
I did test my existing Apexi filter at just over 400bhp. It was no restriction at all when we did back to back runs with the filter on and then removed
TBH I'm only changing because I need a 4" inlet and at about 7years it's a bit scruffy now
Apexi filter on mine and no issues as far as I can tell
Its gone!
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