BRLAMustang
Junior Member
New to the forum. Recently acquired a 2011 GT with 14,000 original miles. Car runs very well with the exception of a little bit of a irregularity in the idle when sitting still. Nothing major. None the less, thinking it might be time to address a few things such as changing the transmission fluid, coolant, and spark plugs (all are original from what I can tell). Suggestions on whether or not the fluids need to be swapped and best plug to run. Only mods executed so far are a Steeda CAI and a Magnaflow 3" exhaust with high flow cats and mufflers. Thanks for your time and attention!
