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I had the BD Power exhaust brake on my 2001, it was vacuum operated but even if you lost vacuum to the system it would only result in not being able to use the brake.
Newer vehicles use an entirely different system than my old '01 Newer ones use the variable pitch turbo vanes to create the back pressure on the pistons, as opposed to restricting the exhaust on my '01.
I think any of them will do the job, it is a matter of cost and preference to product.
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