There are only 3 connections to the OEM intake if you don’t include the MAF. These are, oil breather return, (hence the oil catch tank and pipe work with our kit), sump drain return, again (hence the billet blank and pipe work with our kit specifically for this application), and finally a brake servo bleed airline (our kit provides a silicon blank for this), the removal of the brake servo bleed airline doesn’t detrimentally affect the efficiency of the brake servo or the cars braking ability, we have performed lengthy tests to ensure this is true, and found it to be so.