So that's what was squeaking in the engine!

[sensiman]

lol...so how are the throttle response and fuel economy now?

I go from 0 to 100kph in 10 seconds and cut my gas bill in half!!

Seriously, I only installed it for the sound. Makes the long distance drives I make a little more bearable.
Throttle response is slightly better after 110 but I tend to adhere to speed limit of 100 on the highway most of the time except when passing trucks. Police here don't play when it comes to speeding.