This intake modification will increase airflow to your engine, still retain stock looks and passes emissions For trucks not requiring maximum high-RPM airflow, we can modify your stock 496 / 8.1 liter intake manifold. Vortec 8.1L Intake Manifold Modification 80mm Intake Manifold Modification - $950 90mm Intake Manifold Modification - $1350.Although this large displacement engine produces considerable horsepower and torque, it was retired in favor of a more economical engine platform The GM 8.1L was introduced in 2001 and used in various heavy duty applications, including Chevrolet Silverado and GMC Sierra 2500/3500HD pickups, through the 2006 model year. GM 8.1L Vortec V-8 specs, history, and horsepower and torque curves.We routinely see engines with cracked, chipped and even shattered pistons which result in catastrophic engine damage Vortec 8100 / 8.1L 496cid Pistons The stock Vortec 8.1L cast pistons are not designed to withstand the forces of extreme endurance use, especially in supercharged applications.Home 8.1 Vortec turbo Vortec 8100 8.1L 2.9L Supercharger - 496cid Forced.
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