The APEXI VAFC V-AFC Vtec Air Flow Converter Controller with HARNESS is a performance-enhancing device designed specifically for Honda and Acura vehicles. Made by the reputable brand Apexi, this controller utilizes the V-AFC technology to optimize air flow and improve engine performance. With its harness included for easy installation, this product is a popular choice among car enthusiasts looking to upgrade their vehicle's in-car technology for enhanced power and efficiency.