Chevrolet Performance ZZ6 EFI Turnkey Crate Engines 19433044

This ZZ6 swaps carbureted induction for factory electronic fuel injection, a 5.7-liter, 350-cubic-inch small-block making 405 hp with 406 lb-ft of torque behind it. Chevrolet Performance built it around aluminum cylinder heads and a hydraulic roller camshaft at a 9.27:1 compression ratio, aimed at classic Chevy swaps that want EFI drivability without giving up the small-block's familiar architecture. What arrives ready to run Computer, wiring harness, throttle body, intake manifold, and distributor all ship installed, along with the oil pan, valve covers, timing cover, a long-style water pump, harmonic balancer, and flexplate. That combination of computer and harness is what makes this a true plug-and-play EFI unit rather than one that needs a separate standalone controller sourced and wired in. Fitment and what to add The included flexplate suits automatic transmissions; a manual gearbox will need its own flywheel, which is not included, along with an air cleaner and spark plug wires. This engine carries no emissions certification, so plan on off-road, classic-restoration, or closed-course use rather than street registration, and check local rules before building a vehicle around it. Premium 91-octane-or-higher fuel is recommended. Q: Does it need a separate ECU purchased elsewhere? No, the computer and wiring harness ship with the engine for EFI operation. Q: Will this work with a manual transmission? You will need to add a flywheel, since the included flexplate is for automatics. Specifications Feature Details Brand Chevrolet Performance Manufacturer’s Part # 19433044 Product Type Crate Engine Crate Engine Family Chevy Small Block Actual Displacement 5.7L / 350 C.I.D Horsepower Output 405 HP Torque Output 406 lb-ft Assembled? Yes Engine Block Material Cast Iron Cylinder Head Material Aluminum Engine Balance External Compression Ratio 9.27:1 Camshaft Type Hydraulic Roller Rear Main Seal Style 1-Piece Induction System Fuel Injection Intake Manifold Included? Yes Throttle Body Included? Yes Distributor Included? Yes Oil Pan Included? Yes Valve Covers Included? Yes Timing Cover Included? Yes Water Pump Included? Yes (Long-Style) Harmonic Balancer Included? Yes Flexplate Included? Yes Flywheel Included? No Air Cleaner Included? No Spark Plugs Included? Yes Spark Plug Wires Included? No Computer Included? Yes Wiring Harness Included? Yes Supercharger Included? No Quantity Sold Individually