The superalloy bushings provided by SYTOP are usually cobalt alloys, and the commonly used grade is Cobalt Alloy T400, abbreviated as T400. It is a material with high-temperature resistance, wear resistance, and corrosion resistance.

For the health and sustainable development of all mankind, the national Actively implement the National VI Standard (National Sixth Stage Motor Vehicle Pollutant Emission Standard), so higher requirements are put forward for the material of automobile exhaust valve. The T400 is widely used in GTR valves, turbochargers and wastegates and has unique advantages.