Base your GM LS Gen IV engine build on proven dyno data so you can save time and eliminate guesswork. Seasoned journalist and respected author Richard Holdener reveals effective, popular, and powerful equipment options for the Gen IV LS engine. With this information, you can select the parts to build a powerful and reliable engine. High-performance street, drag race, and other applications are covered. Then, the parts are dyno tested to verify whether they produce the desired and targeted performance increases. This comprehensive guide covers intakes, throttle bodies, manifolds, heads and camshafts, headers and exhaust, engine controls, superchargers and turbochargers, and nitrous oxide. The GM LS engine has redefined small-block V-8 performance. It's the standard powerplant in many GM cars and trucks and it has been installed in a variety of muscle cars, hot rods, and specialty cars to become the undisputed sales leader of crate engines. The aftermarket has fully embraced the GM Gen IV LS engine platform, offering a massive range of heads, intakes, pistons, rods, crankshafts, exhaust, and other performance parts. With so many parts available from a myriad of aftermarket companies, it's easy to become confused by the choices. This book shows you a solid selection process for assembling a powerful engine package and then demonstrates the dyno results of these packages. As such, How to Build LS Gen IV Performance on the Dyno: Optimal Parts Combos for Max Horsepower is an indispensable resource for anyone building GM LS Gen IV engine.