Mine is installed with

Uih?! Pak Z1, sejak bila dah join Sabby club

Already found out what is it, its a VACUUM LEAKER!!!! Don't put it on! Your FL vacuum by factory stock setup only have 17inches/mercury on idling. If you put this piece of crap on your car, your idling vacuum will drop to miserable 14in/hg even if you shut it to maximum(try to turn it on, you're probably left 10in/hg). No doubt, after installed this thing it will provide that kind of amazing water leaking suction sound. If you wish to know how it sound like, go and turn on your water tap, then shut it to LEAKING position, then you'll be able to hear the PSSSSS sound. The thing is a valve between vacuum hose, such as from intake manifold to master brake cylinder. Cut the hose and hook this "performance device" in between, by turning the device will allowed vacuum leakage, that to simulate throttlebody already opened. Besides of placebo and air leaking sound, that f***ing device does not improve max torque, max horse power.

I'd like to hear that company to explain if they have any other reason to back this "performance device"

Rubbish

yes to be honest it's placebo effect device. i already shut it by turning it off. hahaha. not much difference.. no pickup difference.. no FC improvement or whatsoever. now the thing is just in my car turned off. lol