I don't know about rt, but my srt has a pet**** on the lower passenger corner of the radiator. pull the passenger front wheel. open the pet**** (180 degrees counterclockwise and pull out) be carefull, it's plastic. open bleeder screw. mine was on water pump. let coolant out. pull upper radiator hose. I had my fans out at this point, don't know if you would need them out or not. install killer glass pc. close pet****, but leave the bleeder open when you refill coolant. I've heard putting the coolant in at the water neck will introduce less air into the system.
07 BB SRT8 Charger
Tuned by Tim@ MPH-402 RWHP, SRT max plus camshaft,3.73 Getrag LSD,Magnaflow Catback,D1s HID conversion,Removed moldings and badges.,diablosport,predator,180 thermostat,tranZformer,Airaid Cai,BT Catch Can and underhood stuff, Interior red led color swap
Paramount 55 nag1 w/valve body and converter.