Its on the firewall circled red in pic (top left) theres nothing you can do to it, just make sure the vac hose is connected and the electrical connecter is plugged in... As for the mounts with poly bushes youll actually notice the car vibrate more because they are stiffer....just inspect them bud, as for performance gains i guess you would notice better accel etc as the engine is "in place" as it were and not moving about.