[asperformance]

your right Justin the 4000 is the 1pce and 5000 the 2pce options

DBA discs (like a few other higher end/cost options) offer a higher cast iron content casting than the more regular offerings you get...........

this combined with a decent friction level pad makes for a very impressive "std style" set-up....
we rarely stock DBA these days but can source easily if required, as we tend to sell the more regular stock holdings of OEM, "budget" grooved, Brembo Sport and Performance friction disc offerings

alyn