Use these injectors when you want to enhance the performance of your Honda B, H, or D Series (except D17) vehicle. Whether you're a daily driver or a racing enthusiast, these injectors are perfect for you. They are flow - tested at 43.5psi (3Bar) at 90 degrees F fuel temperature and come with all the necessary o - rings for a factory - like fit. You can install them by soldering in the included pigtails or using optional plug - n - play adaptors.