[Delta4]

Have you fitted a oversized TIP ( turbo intake pipe ) if not everything else is a waste of time ( imo )

 

[Delta4]

Do the TIP first and see how you feel, you may not feel the need to change much more.

 

[Delta4]

A 80mm TIP will work fine with either filter, the difference between the two is minimal have a play n see what you like.

 

[Delta4]

I meant cone or drop in filter after market or standard all will do basically the same job, i went with a cone filter and home made heatshield longer and taller so the bonnet acts as a lid, as i did'nt like the racket/noise that the drilled air box made, filtering aside intercoor/s heat soak is a bigger issue so you may want to consider a front mount intercooler or water injection for cooling, this tuning game is a rabbit hole that'll spend your money fast