About the Authors Introduction Chapter 1: Production LS-Series Engines 5.7L LS-Series Gen III Engines Vortec Family Gen III Engines Gen IV Powertrains Gen IV Performance Engines Gen IV Vortec Truck Engines Active Fuel Management Variable Valve Timing Gen III and Gen IV Identification Chapter 2: Engine Blocks 5.7L Gen III Aluminum Engine Block LS1/LS6 4.8L/5.3L Gen III Iron Engine Blocks LR4/LM7/L59 5.3L Gen III Aluminum Engine Blocks L33/LM4 6.0L Gen III Iron Engine Block LQ4/LQ9 6.0L Gen IV Aluminum Engine Block LS2/L76/L77 6.

2L Gen IV Aluminum Engine Block (Naturally Aspirated Applications) LS3/L99 6.2L Gen IV Aluminum Engine Block (Supercharged Applications) LSA/LS9 7.0L Gen IV Aluminum Engine Block LS7 4.8L/5.3L Gen IV Iron Engine Block LY2/L20/LY5/LMG/LMF 5.3L Gen IV Aluminum Engine Block LH6/LH8/LH9/LC9 6.0L Gen IV Iron Engine Block Aftermarket Blocks: LSX, RHS, and LSR Block Upgrades Chapter 3: Rotating Assembly Components Factory LS-Series Crankshafts Reluctor Wheels Connecting Rods Pistons Rotating Assembly Balancing Internal Engine Critical Clearances Performance Rotating Assemblies (Stroker Kits) Weaknesses and Upgrades Chapter 4: Cylinder Heads and Valvetrain Cathedral-Port Cylinder Heads Rectangle-Port Cylinder Heads L92, L94, L76, L98, and L99 versus LS3, LSA, and LS9 Cylinder Heads LS7 Cylinder Heads Ported Cylinder Heads Aftermarket Cylinder Heads: Performance Castings OEM Valve Springs Aftermarket Valve Springs OEM Rocker Arms and Upgrades Chapter 5: Camshafts and Hardware Gen III and Gen IV Camshaft Basics Rocker Arms Pushrods Dial-Indicator Method Counting Turns Method Hydraulic Lifters Lifter Tray Designs Active Fuel Management Lifters Timing Chains Timing Chain Guide/Tensioners Cam Bearings