I have an aftermarket header from a 87 22r engine that I was thinking about swaping to my 22re. There is an O2 tap and it bolts right up to the block of course. My question is do you have to close off the air injection system that normally bolts to the stock exhaust manifold even on aftermarket 22re headers? The 22r I took it off of also had some sort of air injection tube, but was not hooked up to the exhuast. So what have you guys with headers done? Any input is appreciated. Thanks

89' SR5 Pick Em Up
22re W56 3" IFS Lift 33s 4.88s w/ lockrite front