I believe you will need Frt and Rear DS loops to run slicks with the OEM 2pc DS at most tracks. Atleast that's what the tech guys at Etown & Atco told me.
I bought the Frt and Rear BMR DS loops... then got a great deal from Tillman Speed on a Coast One Pcs Alum DS.. so I now only need the Frt one. If you're interested I have the rear one, brand new, up for sale for $50 less then BMR. Just PM me.