Being an experienced PISTON KIT manufacturer for over 15 years, our factory, Cnflap Engine Parts (GZ) Limited, has been investing much on technology development to get high performance products! Oil cooling channel, SN plated finishes are critical production procedures for manufacturing good and stable quality of piston kits! We are clear that it is "good quality and high performance" that enhances our customers to get their max. profits! Well, any comments or advice on product quality you required??