Originally Posted by beipers
It's also quieter than a Jake brake so you can use it in places where exhaust brakes are prohibited by law.
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"normally" engine brakes are prohibbitted not "exhaust" brakes.
Exhaust brakes retard power in a diesel engine, but in an different way than engine brakes. Engine brakes release compressed air through an exhaust valve, but exhaust brakes hold the compression in the engine and slow the crankshaft's rotation, which reduces vehicle speed