The Glixal ATGT-024 GY6 high-performance racing cylinder head assembly offers a compact and robust design for Chinese scooter, moped, ATV, and Go Kart engines. This 125cc-170cc head features 61mm valve size, capable of handling a wide range of displacement. The valve configuration ensures efficient airflow, reducing engine lag and increasing power output. This 152QMI and 157QMJ head upgrade offers improved performance and reliability, suitable for various makes of engines. The "None EGR" type guarantees a direct fit and easy installation without requiring any modifications to the engine's existing exhaust system. The Glixal brand is renowned for its reliability and durability, making this product an excellent choice for motorsports enthusiasts and tech-savvy DIY enthusiasts.