Yeah that's a ball ache with some merc wheels :(
There are
absolutely no gains to be had from a foam filter on these engines. Their filtration is less and the dirt which gets through will damage the turbine blades in the long run.
The standard intake is not limiting whatsoever and has been used in cars with over 300bhp without issue. Paper filters are £10 from the motor factors so it would take at least 4 services (every 10k for arguments sake) to recoup the saving presuming you paid £40 .
If you want to allow more flow without causing any damage look into a S2000 paper filter - However again these don't really provide any benefit unless you're running huge turbos and have cold air feeds
- However they would allow slightly more air to flow due to a larger surface area and are paper rather than foam/cotton so filtration remains high. FOD damage on these turbos can be terminal.
Here's a turbo on a PD engine after it's been ran on a foam/cotton cone filter (appreciate it's slightly different, still point is the same!)
Just some advice bro!
