I am looking to put 300 rwhp down with the 4.6sohc naturally aspirated. I think this is a pretty modest goal, but the part that complicates it is that I want to keep this car as a daily driver, so I don't want to do anything that is going to drastically increase fuel consumption.

I have the 78mm throttle body+plenum from BBK and a BBK chrome cold air kit getting shipped to my house, and will be installing it this week. Those are going to be the first mods to my engine, although I have a borla after-cat already installed. The computer still has the stock tune.

Suggestions on where I could go from here?