However UK Hyundai are useless for accessories for the i30N & the readily available Pipercross (PX1999) isn't approved to keep the warranty
Who told you that? Was it Hyundai UK directly?
Big naughty of them if so as initially they approved the "normal" PX1999 version.
Posts #752 and #779 on this very thread confirmed that.
Air Filter & Intake Discussion
So is the Pipercross warranty friendly and if so is it worth changing the stock filter? As far as I know, Air filters don't affect your warranty, Hyundai even sell the pipercross now! https://accessories.hyundai.co.uk/i30-n-accessories-dirt-resistant-pipercross-air-filter-black so how would...
Air Filter & Intake Discussion
Mine was a bit loose too but a piece of cardboard behind the wedge made it snug. I have the dry version if that makes any difference.
