Between Eurocharged tuning/pullies, and Needswings Intake/Plenumns and 185 fuel fix, there is no reason to not go 185mm and feel perfectly safe.

...well, add a Zt-2 and DashDAQ to that list to monitor your performance.

Glad you finally found the right car for you. Understandable about changing the sound system first, especially if it is not working properly right now. Either way, happy modding!