Exhaust Brake
This is probably the most used piece of equipment on my truck. I use the exhaust brake to do about 80% of all my braking on the highway, city streets, and off-road. My brake shoe are still factory shoes and I've got over 163K+ on the clock. The brake shoes have got 40% left. It's a vast savings to the brakes.
Sorry to say it doesn't exactly has the diesel rumble when you use this style of exhaust brake. But you do get a hissing noise from the exhaust pipe.
There is a bonus to the exhaust brake. You can active it on a cold winter morning and get the pyrometer well above 350°F within a few seconds after starting it in the morning.
I purchased the Jacobs Brake from a Dodge Dealer in Lewiston, Idaho for $800.00