Hi, I've got a Dynatek Fusion EFI setup coming soon and I'm debating putting a set of AIS block off plates in while I have it apart. The reasoning being that the O2 optimizer on the tuner will read more accurately if the AIS isn't pumping extra air into the exhaust stream. I have a M4 slip on and I'm getting tired of the popping on decel and under engine braking, and I hate to run an engine lean in the first place. So thoughts? Opinions?