This item is Part of the FiTech Labor Day Sale Enjoy 25% off at Checkout! Have you been hesitant to switch to EFI because you love the traditional look of a carburetor? Worry no more! The FiTech Retro LS 650 HP Fuel Injection System is the perfect solution. This innovative system offers a “golden” opportunity for impressive looks and performance, providing a classic carburetor aesthetic with all the technology and reliability of modern EFI. Whether you have a junkyard 5.3L or a stroked 427, this complete throttle body kit is ready to perform. This system is ready to go with a needed wiring harness and sensors to get you on the road quickly and easily. It’s designed for both do-it-yourself hot rodders and professional tuners, with a powerful, fully self-tuning ECU that requires no laptop. The included full-color touch screen LCD handheld tuner provides both basic and advanced tuning options for full control. Key Features: Classic Carburetor Look: The gold finish and traditional throttle body design give you the classic aesthetic you love, with all the benefits of modern EFI. Integrated Transmission Control: Includes transmission control for GM 4L60, 4L65, and 4L80 transmissions, simplifying your build. It also has connections for Ford, GM TH350, 700R4, and other transmission linkages. Wide HP Range: Suitable for V8 engines from 250 to 650 horsepower, offering immense versatility. Trouble-Free Performance: Put an end to common carburetor issues like vapor lock and fuel varnish, ensuring your vehicle is reliable and ready to drive. Custom Cam Friendly: This system is designed to work seamlessly with custom camshafts. Easy Installation: Features a 4150 style 4BBL mounting flange for a direct bolt-on fit in place of a carburetor. It comes with plug-and-play harnesses with minimal connections. Technical Specifications: Injectors: Flow-matched 80 lbs injectors. Fuel & Spark Control: Semi-sequential fuel and full spark control. Crank & Cam Compatibility: Compatible with both 24x and 58x crank and cam systems. Sensors: 1 BAR MAP, TPS, and IAC sensors are integrated directly onto the throttle body. Self-Tuning: Fully self-tuning ECU with a Bosch wide band for precise control. Regulator: A tight-fit regulator is included for a clean installation. Knock Sensor: Includes knock sensor control for added engine safety. Handheld Tuner: Full-color, touch screen LCD provides both basic and advanced tuning options.