From 2001 to 2009, General Motors Corporation produced the powerful 8.1L Vortec/496 CID engine for trucks, boats, and more. From factory engines to aftermarket manufacture, Larry Hofer and Don Taylor cover the ins and outs of increasing horsepower and torque for improved performance to suit your needs. This is the only book written about the 8.1L Vortec/496 CID engine. For every use you can think of, there is a different way to configure this engine. This book covers the block, oiling systems, cooling systems, cranks, rods and pistons, cylinder heads, computers, exhausts, and everything you want to know to select the right combination of components. Whether you're a truck or boat owner looking to modify an existing engine or a mechanic wanting to expand your knowledge of Chevy blocks, Chevrolet 8.1 L Vortec/496 Performance Manual has the information you need. These are great performance engines and swap material for GM trucks seeking gobs of low end torque and strong mid-range power. Full-color photographs and additional sections and tips highlight options for advanced modifications. You won’t be disappointed!