Thinking maybe a larger jet may help the performance of my 2005 America. Right now, at cruise (5th gear and 75 mph) It feels like someone stepping down on the brake pedal. Not sure if it's running lean or rich.....Stock pipes, with 3 stages removed, everything else completely stock. Did it come with 42 size jets? I'll order the 45's and see if it helps. About ready to just buy a new Thunderbird...