haha...congrats. My buddy got a plenum spacer installed on his Z and the car started making some weird noise. Sounded like pressure plate bolt was loose cuz it rattled when not on the clutch but stopped when on it. Took it in to Nissan and guy was just like "It sounds like the tranny" so the put a brand new one on for him and the problem ended up being the intake manifold was barely touching the strut bar.