Rocker Retainer Kit - GR Yaris - G16E-GTS EngineRocker Retainer Kit GR Yaris G16E GTS Engine Price is for a set of 12 As we are all learning the weakest link in a high power and high rpm GR Yaris engine is the valvetrain, we believe that a lot of engine failures are initially caused by valvetrain failure. The Denstoj Rocker Retainer kit consists of 12 x hydraulic lash adjusters with a retaining groove for the 12 x sprung steel clips. This adds a security mechanism to reduce the chance of a rocker