K&N versus standard airbox

[Simon Parker]

Noticed a little flat spot when I bring the revs up from idle, looking a little closer the car has quite a small K&N conical air filter, in poor condition and badly fitting. My question is, should I sort out this filter properly? Or should I look for a standard airbox? I'm sure this is a subject that comes up often, all advice much appreciated.

 

[imprezaworks]

Standard airbox is fine

For noise get a better filter

 

[Simon Parker]

Standard airbox is fine

For noise get a better filter

Thanks, I think I`ll get hold of a standard airbox, if the flatspot is still there then I`ll get it plugged in and see if any sensor faults show up.

 

[Simon Parker]

Here is a video of what I call a flat spot, basically the throttle opens when I accelerate quickly from idle but the engine bogs down, any suggestions appreciated