I picked up an '07 Dodge Charger R/T with the Road and Track Performance Package a few days ago and I have a question regarding a CAI setup for the 5.7L HEMI. First off, what brand are you guys running? I see K&N claims a 20hp gain. I am more interested in the torque gains as this is a 4,100 lb car. The more torque off the line the better. Second, will a CAI affect the warranty?