This JJing Oil Cut Off Diode Oil Protector is a great addition to your Harbor Freight Predator 670cc 22Hp Engine. It ensures that your engine runs smoothly and efficiently. The diode is made of high-quality materials and is designed to withstand high temperatures and pressure, making it a reliable and durable choice for your engine. The oil cut off diode is easy to install and requires no modifications to your engine. It is a must-have accessory for anyone who owns a Harbor Freight Predator 670cc 22Hp Engine, as it helps to protect your engine from damage and ensures that it runs at its best.