The exhaust cutout is installed between the header and the muffler within the exhaust system. It’s a Y-pipe installation so that exhaust fumes can travel through two different regions. One region leads toward the muffler and out an exhaust tailpipe. The other region will depend upon your modification. Some exhaust cutouts will have fumes exit almost right after the exhaust cutout. Others can connect to a tailpipe separate from the muffler. A properly installed exhaust cutout will electrically link to the dashboard. From there, the driver can open and close the exhaust cutout at the press of a button. When you open the exhaust cutout, the exhaust fumes bypass the muffler, unleashing a great deal of noise. Then, seamlessly you can close the exhaust cutout to audibly blend in with the rest of the cars next to you. An exhaust cutout easily allows you to switch from racecar sound to normal engine. The exhaust cutout can improve your vehicle’s performance. Simply, the faster that exhaust fumes can be pushed out of the engine, the more horsepower your car will have. When your exhaust cutout is open, you are bypassing the muffler and increasing the speed that fumes leave your vehicle. So, an open exhaust cutout increases a vehicle’s horsepower. Thus, an exhaust cutout has two great benefits to any gearhead looking to improve their ride. Fit all types of vehicles with 2.25" exhaust pipe. Please make sure you have enough space to install before purchase and make sure the size of the exhaust pipe. Valve: We upgrade the screw on the rod. The riveting technology makes the valve stronger than the original for a longer service life and is hard to be damaged. Wireless Remote: To open the cutout you simply push a button while you are in the car, and it will open your exhaust for a throaty rumble exhaust note. Electric Exhaust Cutout Working Temperature: 0℃-150℃. Electric Exhaust Cutout is not recommended to start work in heavy rain or extremely cold weather. Warrant: We provide a 3-month warranty. If you have any questions, please do not hesitate to contact us, we will reply you within 24 hours. * Please make sure you have enough space to install before purchase. Professional Installation is Highly Recommended. * Exhaust control valve motor is NOT WATERPROOF. If below -5degree Celsius the oil in the motor will be frozen and causing the butterfly valve to be stuck.