3" TTI exhaust out the back

Ha, no doubt about the burning eyes. This thing just down right stinks...I'm hoping the EFI will help to reduce that. I did go up 2 sizes on the secondaries and 1 on the primaries on the 4150. It runs 12.5 AFR all the way through a dyno pull...a bit rich at idle. Cats, now there's something I hadn't considered...