All I have done, performance wise, to my 11 CXL Turbo is the Trifecta Tune and a K&N drop-in air filter. The tune is AMAZING. Sorry, but I don't have any BOV advise.
2011 Regal CXL Turbo
T05, 20% Rear 30% Front Tint
MTX Re-Q Processor with Kenwood KAC 7204 Amp powering a Sundown Audio E-10 Subwoofer in a 1.1 cu/ft vented enclosure