i wouldnt worry mate. its not really a performance mod. its basically a re-useable replacement panel filter that may increase performance a bit.
if your ringing up and declaring other mods you could always mention it, but wouldnt ring up just for that.
not really mate. may as well just get an open filter if your going to do that. declare it. wont make hardly any difference though.
best way is to just ask them.
Spot the mistake.its not really a performance mod. its basically a re-useable replacement panel filter that may increase performance a bit.