Fair comment, but at least unlike some kits they have given consideration to the MAF sensor pipework diameter. Another forum member on another site I frequent has had so many issues with his Dbilas he's removed it and gone back to stock airbox and Carbonia intake. The foam they use forms a seal against the bonnet lid, is fireproof/heat resistant, and should you run out of air in the filter enclosure space means you can keep pulling (albeit warmer) air from the engine bay. It's not going to be everyones bag, but I''m happy buying from a company that are entrusted to make filters for £1m rally/race cars. Horses for courses I suppose.