Review on K&N Cold Air Intake Kit for 1990-1993 MAZDA Miata: Boost Horsepower with High Performance 57-5001 Kit - 50-State Legal by Adam Estell

This product did not live up to my expectations for improving my car's performance. While it did slightly increase horsepower and torque, the difference was barely noticeable. On top of that, the installation process was difficult and time-consuming. However, the product was made with high-quality materials. Overall, I would not recommend this product if you're looking for a substantial upgrade to your Automotive emission system.