...the "best"?
I would say Mugen or IceBox from CT
V2 is very good too...but I would prefer an enclosed area for the filter to better calm air turbulence from the wheel arch area.
looking for pure performance not noise.
noise? what are you referring to?
Theres really no real answer to best? But as mentioned above mugen and other inclosed intake systems are what I would go for. A dc2 airbox with a cold air feed and the resonator removed is also a very good set up
as above, i personally have always had v2 and seen good figures there will always be ongoing debate about whats best and this subject comes up fairly regular id go for something you feel is best after doing a bit of research
its a pipe with about 60 mm diamter that locates the air filter into the front right corner of the engine bay...what is it like on yours?
do some research, it has been posted many many times before to answer your question. alot of lads on here use oem dc2 or ek9 air boxes with a cold air feed. It has also been said that a custom intake will benefit you most. A custom diameter (2.5" 3") intake with a cold air feed will you notice your most gains. Also pending on what you do with the car, daily driver, track, drag, etc etc... A good tune also has to do alot with it, if you think you can just slap on an intake and get the best performance from it, sorry to say your wrong. Tuning is very vital with bolt ons and further in the build process. But all in all its up to you with what you want to do with your car. Hope this helps you a bit.