I also didn't buy OEM hoses by the time I replaced mine, just put 3mm silicon hoses between the T and the wastegate/bcs, than from that 3mm hose you should get connector that goes from 3mm to 6mm and from there to the bcs with 6mm hose. The same I did with the hose that goes back to the intake, 6mm hose the connector the other side is I think 4mm (that what I put,don't think it matters what size the air going back to intake) than another connector from 4mm to 6mm again. Hope you understand me. Sent from...somewhere