Perhaps you can start searching under the
Engine & Drivetrain - Nissan 370Z Forum section. What you might consider "a good product" might not be the best for others. They all have different gains on Hp or tq although very similar, they might make a different sound and so on. Some are easy to clean and install while others require the removal of the front bumper (easy stuff) and others require some sort of modification and even relocation of equipment.
Then the equipment by itself does not gives (yields) much of the anticipated power until a tune is performed.
Good luck in your search and I hope you become very satisfied with your choice of product.
