The Edelbrock part #35850 Pro-Flo 4 EFI System for Big-Block Chevy Rectangle Port engines is equipped with the latest in technology and features. The EFI system comes complete with a traditional 4150-Style satin finish single plane intake manifold and 35 Lb/Hr injectors capable of 550 HP with 58 p.s.i. fuel pressure. Also included is a plug and play single connection distributor designed to work specifically with Pro-Flo 4 and a made in the USA fully terminated high-quality harness with clearly labeled connections to ensure a hassle-free installation. The new 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 also has an upgraded Bluetooth chip that is faster, more reliable and will not drop connection. We've 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 our exclusive E-Tuner 4 app with dyno developed base calibrations. The E-Tuner 4 app uses a Bluetooth wireless connection to communicate with the ECU's self-learning capability to continually adjust the calibration to get maximum performance. E-Tuner 4 features a simple and easy to use setup wizard to help you get started. Best of all, the E-Tuner 4 app is free and can be downloaded from the Google Play Store, allowing you to use your personal Android based smart phone or tablet. If you don't have a compatible device, then we also offer kits that include a 7" Android tablet with the E-Tuner 4 app pre-installed. Multiple dash displays are included to allow you to monitor engine vitals with an Android smart phone or tablet.Pro-Flo 4 does not require laptop tuning.
Technical Bulletin
Installation Instructions
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
1965-1975	Chevrolet	Bel Air	Base
1965-1972	Chevrolet	Biscayne	Base
1973-1974	Chevrolet	Blazer	Base
1969-1972	Chevrolet	Brookwood	Base
1978-1980	Chevrolet	C10	Big Ten
1975-1980	Chevrolet	C10	Cheyenne
1975-1980	Chevrolet	C10	Custom Deluxe
1975-1980	Chevrolet	C10	Scottsdale
1975-1980	Chevrolet	C10	Silverado
1968-1974	Chevrolet	C10 Pickup	Base
1968-1974	Chevrolet	C10 Suburban	Base
1975-1980	Chevrolet	C10 Suburban	Custom Deluxe
1975-1980	Chevrolet	C10 Suburban	Scottsdale
1975-1980	Chevrolet	C10 Suburban	Silverado
1990-1993	Chevrolet	C1500	454 SS
1990-1992	Chevrolet	C1500	Cheyenne
1990	Chevrolet	C1500	Scottsdale
1990-1992	Chevrolet	C1500	Silverado
1990-1992	Chevrolet	C1500	WT
1975-1981	Chevrolet	C20	Cheyenne
1981-1986	Chevrolet	C20	Custom
1975-1980	Chevrolet	C20	Custom Deluxe
1981	Chevrolet	C20	Deluxe
1975-1986	Chevrolet	C20	Scottsdale
1975-1986	Chevrolet	C20	Silverado
1968-1974	Chevrolet	C20 Pickup	Base
1968-1974	Chevrolet	C20 Suburban	Base
1981-1986	Chevrolet	C20 Suburban	Custom
1975-1980	Chevrolet	C20 Suburban	Custom Deluxe
1981	Chevrolet	C20 Suburban	Deluxe
1975-1980,1982,1984-1986	Chevrolet	C20 Suburban	Scottsdale
1975-1977,1979-1980,1982-1986	Chevrolet	C20 Suburban	Silverado
1994-1995	Chevrolet	C2500	Base
1991-1995	Chevrolet	C2500	Cheyenne
1991-1992	Chevrolet	C2500	Scottsdale
1991-1995	Chevrolet	C2500	Silverado
1994-1995	Chevrolet	C2500	WT
1992-1995	Chevrolet	C2500 Suburban	Base
1995	Chevrolet	C2500 Suburban	LS
1995	Chevrolet	C2500 Suburban	LT
1992-1994	Chevrolet	C2500 Suburban	Silverado
1975-1981	Chevrolet	C30	Cheyenne
1981-1986	Chevrolet	C30	Custom
1975-1980	Chevrolet	C30	Custom Deluxe
1981	Chevrolet	C30	Deluxe
1975-1986	Chevrolet	C30	Scottsdale
1975-1986	Chevrolet	C30	Silverado
1968-1974	Chevrolet	C30 Pickup	Base
1994-1995	Chevrolet	C3500	Base
1988-1995	Chevrolet	C3500	Cheyenne
1988-1992	Chevrolet	C3500	Scottsdale
1988-1995	Chevrolet	C3500	Silverado
1967,1969,1971-1972	Chevrolet	Camaro	Base
1967,1969	Chevrolet	Camaro	RS
1967-1972	Chevrolet	Camaro	SS
1972	Chevrolet	Camaro	Z28
1966-1972	Chevrolet	Caprice	Base
1973-1976	Chevrolet	Caprice	Classic
1976	Chevrolet	Caprice	Classic Estate
1976	Chevrolet	Caprice	Classic Landau
1975-1976	Chevrolet	Caprice	Classic Sport
1973-1974	Chevrolet	Caprice	Estate
1975	Chevrolet	Caprice	Estate Wagon
1968	Chevrolet	Chevelle	300
1968-1969	Chevrolet	Chevelle	300 Deluxe
1965-1967,1970-1972	Chevrolet	Chevelle	Base
1967-1972	Chevrolet	Chevelle	Concours
1969-1972	Chevrolet	Chevelle	Concours Estate
1967,1973	Chevrolet	Chevelle	Deluxe
1969-1972	Chevrolet	Chevelle	Greenbrier
1968-1972	Chevrolet	Chevelle	Malibu
1968-1972	Chevrolet	Chevelle	Nomad
1965-1972	Chevrolet	Chevelle	SS
1968	Chevrolet	Chevy II	Nova
1965-1974	Chevrolet	Corvette	Base
1966-1975	Chevrolet	El Camino	Base
1968-1974	Chevrolet	El Camino	Custom
1968-1974	Chevrolet	El Camino	SS
1969-1970	Chevrolet	Estate	Base
1973-1974	Chevrolet	G10 Van	Base
1976	Chevrolet	G20	Beauville
1976	Chevrolet	G20	Chevy Van
1973-1974	Chevrolet	G20 Van	Base
1973-1974	Chevrolet	G20 Van	Sportvan
1975-1976,1988-1996	Chevrolet	G30	Beauville
1975-1976,1988-1996	Chevrolet	G30	Chevy Van
1975-1976,1988-1996	Chevrolet	G30	Hi-Cube
1988-1996	Chevrolet	G30	Sportvan
1973-1974	Chevrolet	G30 Van	Base
1965-1976	Chevrolet	Impala	Base
1975-1976	Chevrolet	Impala	Custom
1976	Chevrolet	Impala	Custom Landau
1976	Chevrolet	Impala	S
1975-1976	Chevrolet	Impala	Sport
1965-1967	Chevrolet	Impala	SS
1976,1979-1980	Chevrolet	K10	Cheyenne
1976,1979-1980	Chevrolet	K10	Custom Deluxe
1976,1979-1980	Chevrolet	K10	Scottsdale
1976,1979-1980	Chevrolet	K10	Silverado
1968-1974	Chevrolet	K10 Pickup	Base
1968-1974	Chevrolet	K10 Suburban	Base
1976-1978,1980	Chevrolet	K20	Cheyenne
1976-1978,1980	Chevrolet	K20	Custom Deluxe
1976-1978,1980	Chevrolet	K20	Scottsdale
1976-1978,1980	Chevrolet	K20	Silverado
1968-1974	Chevrolet	K20 Pickup	Base
1968-1974	Chevrolet	K20 Suburban	Base
1985	Chevrolet	K20 Suburban	Custom
1985	Chevrolet	K20 Suburban	Scottsdale
1985	Chevrolet	K20 Suburban	Silverado
1994-1995	Chevrolet	K2500	Base
1991-1995	Chevrolet	K2500	Cheyenne
1991-1992	Chevrolet	K2500	Scottsdale
1991-1995	Chevrolet	K2500	Silverado
1994-1995	Chevrolet	K2500	WT
1992-1995	Chevrolet	K2500 Suburban	Base
1995	Chevrolet	K2500 Suburban	LS
1995	Chevrolet	K2500 Suburban	LT
1992-1994	Chevrolet	K2500 Suburban	Silverado
1977,1980-1981	Chevrolet	K30	Cheyenne
1981-1986	Chevrolet	K30	Custom
1977,1980	Chevrolet	K30	Custom Deluxe
1981	Chevrolet	K30	Deluxe
1977,1980-1986	Chevrolet	K30	Scottsdale
1977,1980-1986	Chevrolet	K30	Silverado
1968-1974	Chevrolet	K30 Pickup	Base
1994-1995	Chevrolet	K3500	Base
1988-1995	Chevrolet	K3500	Cheyenne
1988-1992	Chevrolet	K3500	Scottsdale
1988-1995	Chevrolet	K3500	Silverado
1976	Chevrolet	K5 Blazer	Base
1976-1978	Chevrolet	K5 Blazer	Cheyenne
1977-1978	Chevrolet	K5 Blazer	Custom Deluxe
1978	Chevrolet	K5 Blazer	Silverado
1969-1972	Chevrolet	Kingswood	Base
1969-1972	Chevrolet	Kingswood	Estate
1973-1975	Chevrolet	Laguna	Base
1973	Chevrolet	Laguna	Estate
1975	Chevrolet	Laguna	S3
1974	Chevrolet	Laguna	Type S-3
1965-1967,1973-1974	Chevrolet	Malibu	Base
1974-1975	Chevrolet	Malibu	Classic
1973-1974	Chevrolet	Malibu	Estate
1970-1974	Chevrolet	Monte Carlo	Base
1973-1974	Chevrolet	Monte Carlo	Landau
1973,1975	Chevrolet	Monte Carlo	S
1969-1972	Chevrolet	Nova	Base
1977	Chevrolet	P10	Base
1977	Chevrolet	P10	Step-Van
1973	Chevrolet	P10 Van	Base
1976,1979	Chevrolet	P20	Base
1976,1979	Chevrolet	P20	Step-Van
1970-1971,1973	Chevrolet	P20 Van	Base
1975-1985,1987-1990	Chevrolet	P30	Base
1975-1985,1987-1990	Chevrolet	P30	Step-Van
1970-1974	Chevrolet	P30 Van	Base
1988	Chevrolet	R20	Cheyenne
1987-1988	Chevrolet	R20	Custom Deluxe
1987-1988	Chevrolet	R20	Scottsdale
1987-1988	Chevrolet	R20	Silverado
1987	Chevrolet	R20 Suburban	Custom Deluxe
1987-1988	Chevrolet	R20 Suburban	Scottsdale
1987-1988	Chevrolet	R20 Suburban	Silverado
1989	Chevrolet	R2500	Cheyenne
1989	Chevrolet	R2500	Scottsdale
1989	Chevrolet	R2500	Silverado
1989-1991	Chevrolet	R2500 Suburban	Scottsdale
1989-1991	Chevrolet	R2500 Suburban	Silverado
1988	Chevrolet	R30	Cheyenne
1987-1988	Chevrolet	R30	Custom Deluxe
1987-1988	Chevrolet	R30	Scottsdale
1987-1988	Chevrolet	R30	Silverado
1989-1991	Chevrolet	R3500	Cheyenne
1989-1990	Chevrolet	R3500	Scottsdale
1989-1991	Chevrolet	R3500	Silverado
1969-1972	Chevrolet	Townsman	Base
1987	Chevrolet	V20 Suburban	Custom Deluxe
1987-1988	Chevrolet	V20 Suburban	Scottsdale
1987-1988	Chevrolet	V20 Suburban	Silverado
1990	Chevrolet	V2500 Suburban	Scottsdale
1990	Chevrolet	V2500 Suburban	Silverado
1988	Chevrolet	V30	Cheyenne
1987-1988	Chevrolet	V30	Custom Deluxe
1987-1988	Chevrolet	V30	Scottsdale
1987-1988	Chevrolet	V30	Silverado
1989-1991	Chevrolet	V3500	Cheyenne
1989-1990	Chevrolet	V3500	Scottsdale
1989-1991	Chevrolet	V3500	Silverado
1975-1978	GMC	C15	Base
1977-1978	GMC	C15	Heavy Half
1975-1978	GMC	C15	High Sierra
1977	GMC	C15	Indy Hauler
1975-1978	GMC	C15	Sierra Classic
1975-1978	GMC	C15	Sierra Grande
1978	GMC	C15	Street Coupe
1975-1978	GMC	C15 Suburban	Base
1975-1978	GMC	C15 Suburban	High Sierra
1975-1978	GMC	C15 Suburban	Sierra Classic
1975-1978	GMC	C15 Suburban	Sierra Grande
1968-1974	GMC	C15/C1500 Pickup	Base