The Rochester 2GC large bore carburetor was commonly used on 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles such as the Camaro, Firebird, El Camino, Corvette, and most C-10 through K3500 series trucks. This Sniper EFI 2GC Large Bore master kit bolts directly to the factory 2GC intake manifold with no adapter required, replacing the carburetor with self-tuning electronic fuel injection while retaining the stock appearance.
Key Features:
- Installs directly to the factory Rochester 2GC large bore intake manifold, no adapter required
- Engineered specifically to fit 1974-1978 GM vehicles that used the Rochester 2GC large bore carburetor
- High resolution full color touchscreen for initial setup, tuning, and gauge displays
- Simple calibration wizard builds a base map from a few engine questions and begins self-tuning — no laptop required
- Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning
- Internal fuel pressure regulator preset to 58.5 PSI eliminates the need for external plumbing
- Integrated ignition timing control when paired with Holley HyperSpark, Holley Dual Sync, or MSD Pro Billet distributors
- Universal throttle lever with TH350, 700R4, and 200-4R kickdown provisions
- OEM-style TPS/IAC and fuel pressure regulator for dependable service
- Throttle body mounted ECU — no extra boxes to mount
- Only 4 wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
- Clamp-on oxygen sensor kit for 2.0 in. exhaust with stainless T-bolt clamps and stainless weldable O2 flange
- Designed to fit most factory Rochester 2GC air cleaner assemblies
- Not designed for Tri-Power installations
Specifications:
- Product Type: Sniper EFI 2GC Large Bore
- Finish: Classic Gold
- Injector Size: 100 lb/hr @ 58.5 PSI
- Fuel Pressure: 58.5 PSI
- Fuel Pump Flow Rating: 240 LPH
- Fuel System: Inline, Master Kit
- Sub Category: Service Kits
- Warning: California Proposition 65
- Part Number: 550-857K
Fits 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles equipped with a Rochester 2GC large bore carburetor. Not designed for Tri-Power installations.
FAQ
What vehicles does the 550-857K fit?
1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came equipped with a Rochester 2GC large bore carburetor.
Do I need an intake manifold adapter to install this kit?
No. It installs directly to the factory Rochester 2GC large bore intake manifold with no adapter required.
Does this kit include a fuel system?
Yes, this master kit includes an inline fuel system.
How is this kit tuned?
The touchscreen handheld runs a calibration wizard that asks a few questions about the engine and builds a base map, then the system self-tunes with no laptop required.
Is this kit compatible with Tri-Power setups?
No, it is not designed for Tri-Power installations.