Is my PS3 Slim downgradeable?

Hi, i have a PS3 Slim and i just want to know if it's possible to download with an E3 Flasher Limited Edition. Specs - Firmware: 4.41 - Model Number: CECH2503B - Date Code: 1A If you have any further questions about my console, i will add it onto my question or you can email me at YaveX5@yahoo.com, thanks.