We're running the DSE Speed Kit III with the FE4/FE5 sways and it is an awesome set up!!!! The front sway is a 28mm and the rear sway is a 35mm which are adjustable (tubular). I would suggest adding them to the list as they are one of the better balanced set ups we've run on our Camaro.
DSE also offers an adjustable FE4/FE5 rear endlink that is like nothing else available. We're working on a complete write up listing all of their products and our impressions but their parts are nothing short of the best we've used.
Kind regards,
Jordan Priestley
888.308.6007