Hello people long time no post

Here are some little question need to be answered...because other forum kindda ignore my questions [crazy]
1. Is there Engine Torque Damper for G35 sedan?
2. Is Nismo Sway bar kit worth it? whitch website is the cheapest?
3. After i finish running on the highway and got home. I park my car perfectly and took out the key. As i open my door, i heard strange noise from the car. The sound is from the bottom of the car...it sounds like some metal is clicking constantly, or its like liquid dropping onto metal...
Do you guys have this strange noise also...or its just me?
Whats the problem...if there is any?
Thank you all!