I don't know anything about them, other than it works pretty slick on my Cat C-12. Do they have a kit or something to add one to the 8.2 Detroit? Oh wait, mine is a Jake engine brake, I think the exhaust brake is a bit different. If it's not too pricey it might be worth it.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio