Posted on Mustang6G.com, the anonymous source who claims to be a dealership staff member lists numerous options and colours that they claim will be made available in the updated model.
Some of these include a 10-speed automatic transmission, a 'dual exhaust' - though it's unknown whether this means a bi-modal system - along with a 'GT performance package 2', a Carbon Sport package and adaptive MagneRide dampers that were previously exclusive to the Shelby GT350 variant.
Other changes include the deletion of the 3.7-litre V6 model that is available in overseas markets, while some new colours, Orange Fury and Royal Crimson, will be offered on regular Mustangs along with a new Lead Foot Gray available on the Shelby GT350.
This comes after reports earlier this year and last year that indicated the current six-speed auto will be replaced by a 10-speed shifter co-developed with arch-rival General Motors, with the new transmission having already debuted in several new models including the Camaro ZL1 and Ford F-150 Raptor.
Heavily camouflaged pre-production prototypes for the updated Mustang have also been spied in recent months, though it isn't clear if there are any major changes to the sheet metal.
Expect minor revisions to the head- and tail-lights, possibly the front and rear bumpers as well.
It's believed the facelifted 2018 Mustang will be revealed sometime next year - possibly at the Detroit motor show in January - before rolling out gradually across global markets during the second half of 2017.
Stay tuned to CarAdvice for more Ford Mustang updates over the coming months.