Hello all this is my first post. I recently had a problem with my A/C in my 2005 Magnum RT 5.7 got some grinding going on and the air never really worked right anyways. Ended up being a bad compresser and would of costed about 900.00 in parts and labor as I was not willing to try this job on my own. I decided to just get a smaller serpintine belt and just bypass the compresser. Belt was 20.00 bucks and I can deal with no A/C or drive my other car. Anyways I went threw alot of trouble trying to find the right size belt. Even after measuring it with a string. So if i can save anybody the trouble I had I would like to as with all my internet searching I couldn't find nothing. The part # at autozone is 790K6. I hope this info is helpful to someone in the future.