which was advise by Joe from Zspeed. I did an auto to 5spd conversion and was using a NA trans so I got the Fidanza NA flywheel with a southbend NA Kevlar TZ clutch. The clutch may be NA size but it grips like a stage 3 TT clutch. So smaller and less weight. I've heard great things about the SZ clutches.
"torque gets you off the line...& hp gets you over the line." - TTKeeper