I love my 2008 M35S. It's rated at 290HP but I would like to push it up to around 350 HP without breaking the bank. I've seen cold air intakes, exhausts, headers, and performance chips. They say the chips are easy to install (30 min) and add 50 HP, with no adverse engine problems. Do the cold air intakes really add 10 HP? I used to drag race back in the '70's. Today when I pop the hood I dont even see an engine, just a big cover, LOL. So I could use any help from you younger guys out there, as I don't like to waste my money or make mistakes. Thanks