CHIMMMMe
I have the EBPV re-wired as a Exhaust brake >of Sorts< on my 6 speed. I'v had it on for 'bout 10 years.. I like, and use it alot.
It's more of a "Retarder". It doesn't eliminate brakeing, or work as well as the units installed in the exhaust, or down pipe.. (valve train issues, IMO) it just Helps, a bit, to slow you down by restricting air flow to the Turbo. Works best at rpm's above 2000.
I bought the plug'n play kit off e-bay, but mod'd it a bit by mounting the switch on the floor shift lever, with an LED light on the dash, that is lit when it's on. The kit rewires the Control of the EBPV.. from the PCM... into the drivers hands.
Turned on On, you feel it Holding you Back. Applying the brakes, turns it off as long as your foot is on the pedal. useing throttle, turns it off, working the same way. But using it desending a grade allows you to just "Drift" down a grade.. with much less braking... yet throttle inputs, if needed.
I can still use it for faster warm ups.. which is it's intended use.
I hear it works best on the 6 speed manuals... but works well on the Auto's too.. if you use the gears desending grades ?
It HELP's fer shur.... but is NOT a Engine/Exhaust brake.... as compared ?