[Matt Smith]

My car immediately made a different noise when the pressure-fed tensioners went in. Not too loud though, but definately a more pronounced whining noise, a 'gear driven' sound if that makes sense.
At the time of install, lots of people on this board were adamant this was normal, and I'm inclined to agree in my application. Sounds good anyway.
Yours sounds louder?? Maybe your exhaust is too quiet!
Just kidding. Listen to all the wise advice.

I'm not hugely impressed with the carrera tensioner upgrade, as mine has shown 'issues' with pressure on the right hand side shortly following startup. Time to pop the covers ..again...