[JoeWagon]

I don't think it matters, but I'd put it where the stock one is, because that's exactly how long your existing vacuum lines already are.

If you aren't recirculating, you'll put it before the MAF, so between the SMIC and MAF.

If you ARE recirculating, put it where the stock one was, so you don't have to buy a new BOV return hose... unless the recirc port of the BOV is larger than stock.