honestly...
i think 15bhp is them trying to be funny...
and its alot of money to spend to find it wont fit around the battery and down into the bumper, so unless its intended for the
ibiza i would make sure i could get a refund on it
iv compared how tight the carbonio would be on my car cos my mate has one on his mk4, and i dont reckon it would fit without ruining it and without an fmic
iv said a few times, i plan on buying one of the cheap alu cai kits off ebay for the mk4 golf, bin the filter and stick a green one on there...looking at about 60quid then ( or 40 if u used the filter it comes with)