E-Tec Muffler Sensor Adaptor: Is your E-Tec bogging out on long wide opens pulls since you installed an aftermarket muffler? The problem is how sensitive the e-tec motor is to heat. The aluminum finned design disapates heat to aid in cooling the sensor. Plus the simple adapter moves the sensor out of the extreme heat inside the muffler, allowing your machine to hold maximum RPM all the time. Simple and easy. Threads into your muffler, and simply thread the sensor into the adaptor.