Honda Tuning commissioned After Hours Automotive to build its naturally aspirated K20A2 engine. Individual throttle bodies for each cylinder, a fully prepped block, lightweight pistons and a host of other upgrades combined to make this the most powerful naturally aspirated car, the third most powerful tested in the competition, and the only one to pass the emissions test. Contributing writer Dru Barrios drove the Honda Tuning car in all the track competitions. A Buddy Club kit and carbon fiber hood were subtle modifications that let the RSX's styling speak for itself.