I have a 2004 Dodge Neon SXT. I installed a K&N CAI and noticed the difference. I installed a catback high flow exhaust and notice more power. Now with installing the Stage 2 module and a 180 degree thermostat i definately noticed even more power and throttle response. If you want more power and torque without going internal these mods definately make a difference. Thx again AutoAnything for your great prices and service.