Yeah you should notice a nice difference, the same if not better than fitting an engine damper (and I noticed a nice difference with that), it and they just reduce the movement of the engine on and off acceleration which reduces the drivetrain loses and gets more power to the ground. They'll make a big difference especially if you're existing mountsare pretty worn, and as bourk said they will increase the vibrations too. I'm pretty sure the mounts for the na andturbo's are the same, it would be different if you had a stocl lsd but obviously you won't... I assume you found these on ebay? If you look on toytuning they have the same mounts (but they cost much more) so it gives a bit more info, they are tricky to fit though...