## Unlocked Muffler with Rear Shield, No Catalyst 139QMB/QMA (GY6 50) 4T This sporty muffler is the perfect choice for owners of scooters with a 139QMB/QMA (GY6 50) 4T engine who are looking for improved performance and a sporty sound. Without a catalyst, this muffler offers less exhaust flow resistance, which translates into better engine performance. The additional rear shield protects against burns and gives the muffler a stylish look. ### Benefits * **Improved Performance:** The lack of a catalyst reduces exhaust flow resistance, contributing to better engine breathing and increased power. * **Sporty Sound:** The muffler offers a racy, sporty sound that will emphasize the character of your scooter. * **Rear Shield:** Provides protection against burns and adds an aesthetic look. * **Compatibility:** Perfectly fits scooters with a 139QMB/QMA (GY6 50) 4T engine. * **Easy Installation:** Installing the muffler is quick and easy. ### Summary The unlocked muffler is an excellent way to improve performance and give your scooter a sporty character. It provides a noticeable difference in driving dynamics while ensuring safety thanks to the rear shield. Choose this muffler if you want to enjoy the full potential of your 139QMB/QMA (GY6 50) 4T scooter.