UltraRacer13 has some leaking issues with his Stett OC upgrade also. I think he upgraded his lines and no more issues. Our cars also have a known issue with the oil filter housing gasket and a leak there. Try PMing UltraRacer13 to see what he did.
COBB Stage 2+ AGGRESSIVE / STETT Cold-Air Intake / STETT Charge Pipe / TiAL Blow-off Valve / ETS 5" Front-Mount Intercooler / Active Autowerke 3" Catless Downpipes / Active Autowerke Signature Exhaust / AST 4100 Coilovers / OS Giken Superlock LSD / All MOTUL Fluids