Next performance upgrade.
Would appreciate any advice on the following. Have 2007 GT 4000 miles. Put on a BBK CAI and ready for the next upgrade. Am thinking along the lines of the old adage "air in, air out", so I am trying to decide whether to install cat back mufflers or buy a performance tuner.
I'm not that familiar with the performance tuners, but am knowledgable enough to guess that they lean out the air fuel mixture from the factory settings. Anyone have a concern about the extra heat this generates on the exhaust valves and heads?
Any recommendations as to brands of the above would be appreciated.