Edelbrock's Pro-Flo 4 EFI Kit #35760 for 1986 & Earlier Small-Block Chevy engines. The EFI system comes complete with traditional 4150-Style satin finish single plane intake manifold and 29 Lb/Hr injectors capable of 450 HP with 58 p.s.i. fuel pressure. Also included is plug clearly labeled connections to ensure a hassle-free installation. Pro-Flo 4 EFI systems feature an all-new ECU with a faster processor, a water proof design and measures half the depth of the previous ECU. It has an upgraded Bluetooth chip that is faster, more reliable and will not drop connection. Edelbrock added more features for the advanced tuner giving you control over air-fuel ratios, ignition curve, idle speed, acceleration fuel, coolant fans, Rev limiter while retaining the simplicity Pro-Flo is known for. The key to the system is the exclusive E-Tuner 4 app with dyno developed base calibrations. The E-Tuner 4 app uses Bluetooth wireless connection to communicate with the ECU's self-learning capability to continually adjust the calibration to get the maximize performance. E-Tuner 4 features a simple and easy to use setup wizard to help you get started as well as multiple dash displays so you can monitor your engines vitals. The exclusive Edelbrock E-Tuner 4 app is Free and Available for Android and IOS based smart phone or tablet.