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Description
Holley Sniper EFI 2GC Large Bore Master Kit- Classic GoldHolley Sniper EFI 2GC Large Bore Master Kit Classic Gold Sniper EFI Conversion kit for 1974 1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with Rochester 2GC Large Bore Carbs. Overview Let's face it, you love driving your classic car, but dread the hassles with your Rochester 2GC Large Bore carburetor. Today's fuels are blended for modern fuel injection, not that old 2 Jet carburetor from 50+ years ago. Holley makes it easy to convert
Holley Sniper EFI 2GC Large Bore Master Kit- Classic GoldSniper EFI Conversion kit for 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with Rochester 2GC Large Bore Carbs.
Overview
Let's face it, you love driving your classic car, but dread the hassles with your Rochester 2GC Large Bore carburetor. Today's fuels are blended for modern fuel injection, not that old 2 Jet carburetor from 50+ years ago. Holley makes it easy to convert your classic car with a Rochester 2GC Large Bore two barrel carburetor to fuel injection. The Sniper EFI 2GC Large Bore is a bolt on electronic fuel injection system that will put the fun back in your classic ride. 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, Omega and most C-10 through K3500 series trucks. Check out our year/make/model application search at Holley.com! Installation of the Sniper EFI 2GC Large Bore throttle body is simple and straightforward: ?????? Remove your current carburetor and bolt on the new Sniper EFI system. No intake manifold adapters required! ?????? Reinstall your factory or custom air cleaner. The Sniper EFI 2GC air cleaner flange matches the Rochester 2GC so it accepts most factory air cleaners. Not only does the Sniper EFI 2GC offer superior throttle response and WOT power over the carburetor, but you may also benefit from increased fuel economy! Put an end to cold start issues, hesitations, vapor lock, and flooding with the accuracy of EFI. You can also use the Sniper EFI 2GC to control the ignition timing, taking EFI to the next level. The Sniper EFI 2GC system is capable of supporting 350 HP on naturally aspirated engines. Upgrade to Sniper EFI today!
Features:
- Bolt on Rochester 2GC large bore two barrel carburetor replacement
- Installs directly to the factory Rochester 2GC large bore intake manifold, no adapter required
- Engineered to fit 1974-1978 GM vehicles that utilized the Rochester 2GC large bore carburetor
- Designed to fit most factory Rochester 2GC large bore air cleaner assemblies
- Installs directly to the factory Rochester 2GC intake manifold, no adapter required
- Designed to fit most factory 2GC air cleaner assemblies
- Universal throttle lever with TH350, 700R4 200-4R kick down provisions
- Throttle body mounted ECU ???? no extra boxes to mount
- Not designed for Tri-Power installations.
- Supports up to 350HP with Two 100lb/hr Injectors
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition RPM)
- Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
- Integrated ignition timing control (with Holley Hyperspark, Holley Dual Sync or MSD Pro Billet distributors)
- High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
- Self-tuning ECU means you dont have to be a computer/tuning wiz to have EFI!
- The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
- OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
- Included clamp-on oxygen sensor kit for 2.0" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
Details:
- Finish: Classic Gold
- Fuel Pressure: 58.5 PSI
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet / Outlet Size: 9/16-18 Female O-Ring (AN 6)
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Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.6 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 4
Nice and Priced right
Size: X-Large, Color: Black
Looks good, Delivered fast, Holds up in the wash, Priced well
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Reviewed in the United States on August 1, 2025
★★★★★ 5
Fits well
Well made very comfortable fits very good
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Runs a touch larger than other same brand polo's, light and breathable.
Size: 3X-Large, Color: Black
Super ligh, breathable and thin. Stretchy but still leaves room for the dad bod belly and dad bod boobs lol This specific polo runs a bit larger than most of the others by this same company so be aware of that. I am 5'6" - 280lbs and wear a 4xl normally in AZ's but this one fit perfect in a 3xl. Great summer night shirt, just be mindful not to snag it on something and also better to hand wash this as even a gentle cycle has the tendency to cause some damage.
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Reviewed in the United States on July 3, 2025
★★★★★ 3
Fits snug size up
Size: 4X-Large, Color: Grey W/ Black Dots
I would definitely size up they fit a little snug, overall good quality and it’s tagless which is a plus.
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Reviewed in the United States on December 30, 2025
★★★★★ 5
Comfortable and Stylish
Size: Large, Color: Black
Bought for the husband and he loves it. Comfortable and nice. Says he would pair it with jeans. Flattering. Color is great. Not sure yet on fading and wear, haven’t had it long enough.
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Reviewed in the United States on August 24, 2025
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