APk 07-15 Mercedes-AMG M156 / M159 Titanium Valve Spring Retainers

This set was designed to specifically address the issue of unnecessary mass within the factory valvetrain. It helps to eliminate a considerable amount of weight relative to the factory steel parts they’re replacing: Our testing shows a 39% weight reduction and we’ve provided the pictures to prove it. Perfect fit, finish, and reliability!! Extensive street […]