Be careful if you do decide to lower your spec-v. They have very little wheel travel at the stock ride height. More people mess it up than get it right. If your butterfly screws are not locktited in place, now is a good time to address that. Also, the precat gut is a popular preventive measure to preserve your engine. If you have any questions, feel free to ask me. You can also check out b15sentra.net. There are quite a few knowledgeable folks there.