Okay so my build is starting to ti together & i was gonna have a Exhaust made & was wondering if i could get some opinions on recommended piping size.

Might be dumb but i was thinking about running a Full 3" exhaust into the twiploop.

Heres the specs on my build
82mm Gsr
ls stroked
ima guess around 12:1 - 12:5 compression
B16 head P&P
3 angle valve job
Ported intake mani
+1mm flat top valves
skunk2 pro2's
hytech tri-y rep header
& prolly gonna run a obx twinloop muffler.