I can't say too much being that my car is still pretty much stock. But I know just from reading all the forum's that beau's service is second to none, along with his knowledge. To me that means that if there is a problem with running a single open-vent, that the problem will be addressed before the actual release date. Or if the already produced units need some modification, that the tba date will be pushed back. So far everyone's products that mam has made has been high quality, why wouldn't the fmic kit be just the same? Hopefully with the tester's cars, some are modded, and some stock, just to make sure the setup whether single open-vent, or dual will work with whatever car it is going on.