Paano ang Cylinder Head Assembly Modifications Can Improve Engine Response Table of contents 1. Introduction 2. Understanding Cylinder Head Head. Assembly 3. Importance of Cylinder Head Modifications 4. Mga uri ng Cylinder Head Modifications 4.1 Porting and Polishing 4.2 Upgrading Valves. at Springs 4.3 Changing Cylinder Head Camshaft 4.4