The GM LS-Series V-8s are easily the most popular engines in the aftermarket right now. They have proven to be full of power potential and are readily available in either new or used condition in a wide range of displacements. Choosing the best-possible cylinder head to match the rest of the package is key to making any LS-based project engine perform to its highest potential. This book reviews every readily available factory and aftermarket cylinder head designed for GM LS-Series engines, and delivers the facts about each in an easily comparable format. It includes the basic dimensions of each head, along with their claimed airflow rates. Also included is information on interchangeability, combustion chamber sizes, compression ratios, applications, performance characteristics, helpful tips, and even a chapter on intakes. Whether you re a budget enthusiast looking for the best-possible factory head to top your specific combination, an engine swapper looking to modernize your vintage muscle car, or a racer looking for the best-flowing head out there, High-Performance GM LS- Series Cylinder Head Guide is essential for accomplishing your goals.