Complete 6-71 Roots Supercharger Kit Compatible with Big Block Chevy 396/402/427/454/496/502 - Blower with Intake Manifold, Gilmer Pulleys, Belt & Gaskets - Adds 45-55% HP

Every Speedmaster 6-71 supercharger is crafted with robust materials and precision engineering to withstand demanding conditions. Designed for long-term use, the heavy-duty bearing plates and efficient rotor design ensure consistent performance. Supercharger Unit - Polished 6-71 Roots-Style Blower Intake System - Aluminum Supercharger Intake Manifold - Dual 4-Barrel Carburetor Adapter Plate Drive Components - Supercharger Snout with Coupler - Upper and Lower Supercharger Drive Pulleys (50T and 55T) - 3” Gilmer-Style Drive Belt - Idler Pulley with Bracket Assembly Sealing and Hardware - Supercharger to Intake Manifold Gasket - Carburetor Plate Gasket with Screen Mesh - Breakaway Stud Kit Accessory Drive Components - V-Belt Accessory Drive Pulley Alignment and Fitment Components - May include additional alignment or fitment hardware depending on the specific kit configuration. Includes all necessary components for a seamless installation, ensuring a hassle-free setup. Boost your engine’s horsepower by 45-55%, delivering exceptional performance for street and competition applications. Features a polished aluminum case with precision-engineered, double-pinned 3-lobe rotors, timed and clearanced for optimal performance and Speedmaster isn’t just a parts manufacturer—it’s a lifestyle. Born in 1979 from a passion project in a modest garage, we’ve grown into a global force in the automotive world. Our heritage is built on craftsmanship, innovation, and performance. With over 25,000 components, cutting-edge facilities across three continents, and more than 400 skilled staff, we serve enthusiasts who demand the best—on the street, track, or strip. We live for the roar of engines and the thrill of the build. At Speedmaster, we’re a community of builders, racers, and dreamers. Every part reflects decades of knowledge, rigorous testing, and a passion for excellence. Every Speedmaster product is designed, tested, and built in-house with a blend of heritage and technology. Our exclusive DNA line, USA-Assembled Program, and “Track Proven” badge reflect our pursuit of excellence. From engines to transmissions, we push limits while honoring craftsmanship.