I would be interested in your opinion of the OEM Performance Exhaust. I hope they are installing the additional rear air damper with it as well. I have been thinking about purchasing quad tip exhaust system for mine eventually, but would like to add something special to the rear to enhance the look of the quad tips. The OEM performance air damper will not accommodate a quad tip since it's configuration is definitely for a single exhaust tip on each side, but if you could put the RC-F air damper on an RC 350 F-sport to accommodate quad tips, that would be awesome.