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Holley Sniper EFI

SNIPER 2GC LARGE, GOLD, MASTER KIT - Holley Sniper EFI 2GC Large Bore Master Kit - Classic Gold

Regular price £1,738.99 GBP inc VAT
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SKU: 550-857k

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Holley Sniper EFIPart 550-857k✓ Fits 294 vehiclesMade in US

Product Details

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Vehicle Fitment & Compatibility

294 applications
Compatible Engines
5.7L V8 350ci5.0L V8 305ci6.6L V8 400ci5.0L V8 307ci
Application Notes
KitClassic Gold.
View all 294 vehicle applications
Years
Make / Model
Submodel
Engine
1974–1982
Checker Marathon
5.7L V8 350ci
1974–1982
Checker Marathon
5.7L V8 350ci
1975
Checker Marathon
5.7L V8 350ci
1974–1975
Chevrolet Bel Air
5.7L V8 350ci
1974
Chevrolet Blazer
5.7L V8 350ci
1987–1994
Chevrolet Blazer
5.7L V8 350ci
1987
Chevrolet Blazer
5.7L V8 350ci
1988–1991
Chevrolet Blazer
5.7L V8 350ci
1992–1993
Chevrolet Blazer
5.7L V8 350ci
1994
Chevrolet Blazer
5.7L V8 350ci
1994
Chevrolet Blazer
5.7L V8 350ci
1975
Chevrolet C10
5.7L V8 350ci
1975
Chevrolet C10
5.7L V8 350ci
1975
Chevrolet C10
5.7L V8 350ci
1975
Chevrolet C10
5.7L V8 350ci
1975
Chevrolet C10
5.7L V8 350ci
1974
Chevrolet C10 Pickup
5.7L V8 350ci
1974
Chevrolet C10 Suburban
5.7L V8 350ci
1975
Chevrolet C10 Suburban
5.7L V8 350ci
1975
Chevrolet C10 Suburban
5.7L V8 350ci
1975
Chevrolet C10 Suburban
5.7L V8 350ci
1975
Chevrolet C20
5.7L V8 350ci
1975
Chevrolet C20
5.7L V8 350ci
1975
Chevrolet C20
5.7L V8 350ci
1975
Chevrolet C20
5.7L V8 350ci
1974
Chevrolet C20 Pickup
5.7L V8 350ci
1974
Chevrolet C20 Suburban
5.7L V8 350ci
1975
Chevrolet C20 Suburban
5.7L V8 350ci
1975
Chevrolet C20 Suburban
5.7L V8 350ci
1975
Chevrolet C20 Suburban
5.7L V8 350ci
1975
Chevrolet C30
5.7L V8 350ci
1975
Chevrolet C30
5.7L V8 350ci
1975
Chevrolet C30
5.7L V8 350ci
1975
Chevrolet C30
5.7L V8 350ci
1975
Chevrolet C30
5.7L V8 350ci
1974
Chevrolet C30 Pickup
5.7L V8 350ci
1974–1978
Chevrolet Camaro
5.7L V8 350ci
1974–1978
Chevrolet Camaro
5.7L V8 350ci
1974
Chevrolet Camaro
5.7L V8 350ci
1975
Chevrolet Camaro
5.7L V8 350ci
1976–1978
Chevrolet Camaro
5.0L V8 305ci
1976–1978
Chevrolet Camaro
5.0L V8 305ci
1976–1978
Chevrolet Camaro
5.7L V8 350ci
1976–1978
Chevrolet Camaro
5.0L V8 305ci
1976–1978
Chevrolet Camaro
5.7L V8 350ci
1976–1978
Chevrolet Camaro
5.0L V8 305ci
1977–1978
Chevrolet Camaro
5.7L V8 350ci
1974–1975
Chevrolet Caprice
6.6L V8 400ci
1974–1975
Chevrolet Caprice
5.7L V8 350ci
1974
Chevrolet Caprice
6.6L V8 400ci
1974
Chevrolet Caprice
5.7L V8 350ci
1975
Chevrolet Caprice
6.6L V8 400ci
1975
Chevrolet Caprice
5.7L V8 350ci
1975
Chevrolet Caprice
6.6L V8 400ci
1973–1977
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.0L V8 307ci
1973
Chevrolet Chevelle
5.0L V8 307ci
1973
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.7L V8 350ci
1973
Chevrolet Chevelle
5.0L V8 307ci
1974–1977
Chevrolet Chevelle
5.7L V8 350ci
1974–1976
Chevrolet Chevelle
6.6L V8 400ci
1974–1976
Chevrolet Chevelle
5.7L V8 350ci
1974–1976
Chevrolet Chevelle
6.6L V8 400ci
1974–1976
Chevrolet Chevelle
6.6L V8 400ci
1974–1976
Chevrolet Chevelle
6.6L V8 400ci
1974–1976
Chevrolet Chevelle
5.7L V8 350ci
1976–1977
Chevrolet Chevelle
5.0L V8 305ci
1976–1977
Chevrolet Chevelle
5.0L V8 305ci
1976
Chevrolet Chevelle
5.0L V8 305ci
1974
Chevrolet Corvette
5.7L V8 350ci
1975
Chevrolet Corvette
5.7L V8 350ci
1974–1978
Chevrolet El Camino
5.7L V8 350ci
1974–1978
Chevrolet El Camino
5.7L V8 350ci
1974
Chevrolet El Camino
5.7L V8 350ci
1975–1977
Chevrolet El Camino
5.7L V8 350ci
1976–1978
Chevrolet El Camino
5.0L V8 305ci
1976–1977
Chevrolet El Camino
5.0L V8 305ci
1977–1978
Chevrolet El Camino
5.0L V8 305ci
1977–1978
Chevrolet El Camino
5.7L V8 350ci
1977–1978
Chevrolet El Camino
5.0L V8 305ci
1975–1978
Chevrolet G10
5.7L V8 350ci
1975–1978
Chevrolet G10
5.7L V8 350ci
1975–1978
Chevrolet G10
5.7L V8 350ci
1974
Chevrolet G10 Van
5.7L V8 350ci
1974
Chevrolet G10 Van
5.7L V8 350ci
1975–1978
Chevrolet G20
5.7L V8 350ci
1975–1978
Chevrolet G20
5.7L V8 350ci
1975–1978
Chevrolet G20
5.7L V8 350ci
1978
Chevrolet G20
5.7L V8 350ci
1974
Chevrolet G20 Van
5.7L V8 350ci
1974
Chevrolet G20 Van
5.7L V8 350ci
1975–1978
Chevrolet G30
5.7L V8 350ci
1975–1978
Chevrolet G30
5.7L V8 350ci
1975–1978
Chevrolet G30
5.7L V8 350ci
1975–1978
Chevrolet G30
5.7L V8 350ci
1974
Chevrolet G30 Van
5.7L V8 350ci
1974
Chevrolet G30 Van
5.7L V8 350ci
1974–1978
Chevrolet Impala
5.7L V8 350ci
1974–1976
Chevrolet Impala
6.6L V8 400ci
1975–1977
Chevrolet Impala
5.7L V8 350ci
1975–1976
Chevrolet Impala
5.7L V8 350ci
1975–1976
Chevrolet Impala
6.6L V8 400ci
1975–1976
Chevrolet Impala
6.6L V8 400ci
1976
Chevrolet Impala
6.6L V8 400ci
1976
Chevrolet Impala
5.7L V8 350ci
1976
Chevrolet Impala
6.6L V8 400ci
1976
Chevrolet Impala
5.7L V8 350ci
1977–1978
Chevrolet Impala
5.7L V8 350ci
1977–1978
Chevrolet Impala
5.0L V8 305ci
1977–1978
Chevrolet Impala
5.0L V8 305ci
1977
Chevrolet Impala
5.0L V8 305ci
1975
Chevrolet K10
5.7L V8 350ci
1975
Chevrolet K10
5.7L V8 350ci
1975
Chevrolet K10
5.7L V8 350ci
1975
Chevrolet K10
5.7L V8 350ci
1974
Chevrolet K10 Pickup
5.7L V8 350ci
1974
Chevrolet K10 Suburban
5.7L V8 350ci
1975
Chevrolet K10 Suburban
5.7L V8 350ci
1975
Chevrolet K10 Suburban
5.7L V8 350ci
1975
Chevrolet K10 Suburban
5.7L V8 350ci
1975
Chevrolet K20
5.7L V8 350ci
1975
Chevrolet K20
5.7L V8 350ci
1975
Chevrolet K20
5.7L V8 350ci
1975
Chevrolet K20
5.7L V8 350ci
1974
Chevrolet K20 Pickup
5.7L V8 350ci
1974
Chevrolet K20 Suburban
5.7L V8 350ci
1975
Chevrolet K20 Suburban
5.7L V8 350ci
1975
Chevrolet K20 Suburban
5.7L V8 350ci
1975
Chevrolet K20 Suburban
5.7L V8 350ci
1974
Chevrolet K30 Pickup
5.7L V8 350ci
1975
Chevrolet K5 Blazer
5.7L V8 350ci
1975
Chevrolet K5 Blazer
5.7L V8 350ci
1975
Chevrolet Malibu
5.7L V8 350ci
1978
Chevrolet Malibu
5.7L V8 350ci
1978
Chevrolet Malibu
5.7L V8 350ci
1978
Chevrolet Malibu
5.0L V8 305ci
1978
Chevrolet Malibu
5.7L V8 350ci
1978
Chevrolet Malibu
5.0L V8 305ci
1978
Chevrolet Malibu
5.0L V8 305ci
1978
Chevrolet Malibu
5.7L V8 350ci
1978
Chevrolet Malibu
5.0L V8 305ci
1974
Chevrolet Monte Carlo
5.7L V8 350ci
1974
Chevrolet Monte Carlo
6.6L V8 400ci
1974
Chevrolet Monte Carlo
5.7L V8 350ci
1974
Chevrolet Monte Carlo
6.6L V8 400ci
1975–1977
Chevrolet Monte Carlo
5.7L V8 350ci
1975–1976
Chevrolet Monte Carlo
6.6L V8 400ci
1976
Chevrolet Monte Carlo
5.7L V8 350ci
1976
Chevrolet Monte Carlo
6.6L V8 400ci
1976–1977
Chevrolet Monte Carlo
5.0L V8 305ci
1976
Chevrolet Monte Carlo
5.0L V8 305ci
1978
Chevrolet Monte Carlo
5.0L V8 305ci
1978
Chevrolet Monte Carlo
5.0L V8 305ci
1976–1978
Chevrolet Monza
5.0L V8 305ci
1976–1978
Chevrolet Monza
5.0L V8 305ci
1976
Chevrolet Monza
5.0L V8 305ci
1977
Chevrolet Monza
5.0L V8 305ci
1977
Chevrolet Monza
5.0L V8 305ci
1977
Chevrolet Monza
5.0L V8 305ci
1977
Chevrolet Monza
5.0L V8 305ci
1978
Chevrolet Monza
5.0L V8 305ci
1978
Chevrolet Monza
5.0L V8 305ci
1978
Chevrolet Monza
5.0L V8 305ci
1978
Chevrolet Monza
5.0L V8 305ci
1974–1978
Chevrolet Nova
5.7L V8 350ci
1974–1975
Chevrolet Nova
5.7L V8 350ci
1975–1978
Chevrolet Nova
5.7L V8 350ci
1975
Chevrolet Nova
5.7L V8 350ci
1976–1978
Chevrolet Nova
5.0L V8 305ci
1976–1978
Chevrolet Nova
5.0L V8 305ci
1976–1977
Chevrolet Nova
5.7L V8 350ci
1976–1977
Chevrolet Nova
5.0L V8 305ci
1976
Chevrolet Nova
5.0L V8 305ci
1976
Chevrolet Nova
5.7L V8 350ci
1977–1978
Chevrolet Nova
5.0L V8 305ci
1977–1978
Chevrolet Nova
5.7L V8 350ci
1978
Chevrolet Nova
5.7L V8 350ci
1978
Chevrolet Nova
5.0L V8 305ci
1974
Chevrolet P20 Van
5.7L V8 350ci
1974
Chevrolet P30 Van
5.7L V8 350ci
1975
GMC C15
5.7L V8 350ci
1975
GMC C15
5.7L V8 350ci
1975
GMC C15
5.7L V8 350ci
1975
GMC C15
5.7L V8 350ci
1975
GMC C15 Suburban
5.7L V8 350ci
1975
GMC C15 Suburban
5.7L V8 350ci
1975
GMC C15 Suburban
5.7L V8 350ci
1975
GMC C15 Suburban
5.7L V8 350ci
1974
GMC C15/C1500 Pickup
5.7L V8 350ci
1974
GMC C15/C1500 Suburban
5.7L V8 350ci
1975
GMC C25
5.7L V8 350ci
1975
GMC C25
5.7L V8 350ci
1975
GMC C25
5.7L V8 350ci
1975
GMC C25
5.7L V8 350ci
1975
GMC C25 Suburban
5.7L V8 350ci
1975
GMC C25 Suburban
5.7L V8 350ci
1975
GMC C25 Suburban
5.7L V8 350ci
1975
GMC C25 Suburban
5.7L V8 350ci
1974
GMC C25/C2500 Pickup
5.7L V8 350ci
1974
GMC C25/C2500 Suburban
5.7L V8 350ci
1975
GMC C35
5.7L V8 350ci
1975
GMC C35
5.7L V8 350ci
1975
GMC C35
5.7L V8 350ci
1975
GMC C35
5.7L V8 350ci
1974
GMC C35/C3500 Pickup
5.7L V8 350ci
1978
GMC Caballero
5.0L V8 305ci
1978
GMC Caballero
5.0L V8 305ci
1978
GMC Caballero
5.0L V8 305ci
1975
GMC G15
5.7L V8 350ci
1975
GMC G15
5.7L V8 350ci
1975
GMC G15
5.7L V8 350ci
1974
GMC G15/G1500 Van
5.7L V8 350ci
1974
GMC G15/G1500 Van
5.7L V8 350ci
1975
GMC G25
5.7L V8 350ci
1975
GMC G25
5.7L V8 350ci
1975
GMC G25
5.7L V8 350ci
1974
GMC G25/G2500 Van
5.7L V8 350ci
1974
GMC G25/G2500 Van
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1975
GMC G35
5.7L V8 350ci
1974
GMC G35/G3500 Van
5.7L V8 350ci
1974
GMC G35/G3500 Van
5.7L V8 350ci
1974
GMC G35/G3500 Van
5.7L V8 350ci
1974–1975
GMC Jimmy
5.7L V8 350ci
1975
GMC Jimmy
5.7L V8 350ci
1975
GMC Jimmy
5.7L V8 350ci
1975
GMC Jimmy
5.7L V8 350ci
1975
GMC K15
5.7L V8 350ci
1975
GMC K15
5.7L V8 350ci
1975
GMC K15
5.7L V8 350ci
1975
GMC K15
5.7L V8 350ci
1975
GMC K15 Suburban
5.7L V8 350ci
1975
GMC K15 Suburban
5.7L V8 350ci
1975
GMC K15 Suburban
5.7L V8 350ci
1975
GMC K15 Suburban
5.7L V8 350ci
1974
GMC K15/K1500 Pickup
5.7L V8 350ci
1974
GMC K15/K1500 Suburban
5.7L V8 350ci
1975
GMC K25
5.7L V8 350ci
1975
GMC K25
5.7L V8 350ci
1975
GMC K25
5.7L V8 350ci
1975
GMC K25
5.7L V8 350ci
1975
GMC K25 Suburban
5.7L V8 350ci
1975
GMC K25 Suburban
5.7L V8 350ci
1975
GMC K25 Suburban
5.7L V8 350ci
1975
GMC K25 Suburban
5.7L V8 350ci
1974
GMC K25/K2500 Pickup
5.7L V8 350ci
1974
GMC K25/K2500 Suburban
5.7L V8 350ci
1974
GMC K35/K3500 Pickup
5.7L V8 350ci
1975
GMC P25
5.7L V8 350ci
1975
GMC P25
5.7L V8 350ci
1974
GMC P25/P2500 Van
5.7L V8 350ci
1975
GMC P35
5.7L V8 350ci
1975
GMC P35
5.7L V8 350ci
1974
GMC P35/P3500 Van
5.7L V8 350ci
1974–1975
GMC Sprint
5.7L V8 350ci
1974
GMC Sprint
5.7L V8 350ci
1975
GMC Sprint
5.7L V8 350ci
1975
GMC Sprint
5.7L V8 350ci
1975
GMC Sprint
5.7L V8 350ci
1978
Oldsmobile Cutlass
5.0L V8 305ci
1978
Oldsmobile Cutlass Calais
5.0L V8 305ci
1978
Oldsmobile Cutlass Salon
5.0L V8 305ci
1978
Oldsmobile Cutlass Salon
5.0L V8 305ci
1978
Oldsmobile Cutlass Salon
5.0L V8 305ci
1978
Oldsmobile Cutlass Supreme
5.0L V8 305ci
1978
Oldsmobile Cutlass Supreme
5.0L V8 305ci
1977–1978
Oldsmobile Omega
5.0L V8 305ci
1977–1978
Oldsmobile Omega
5.0L V8 305ci
1977–1978
Oldsmobile Omega
5.0L V8 305ci
1977
Oldsmobile Omega
5.0L V8 305ci
1977
Oldsmobile Omega
5.0L V8 305ci
1978
Oldsmobile Omega
5.0L V8 305ci
1977–1978
Oldsmobile Starfire
5.0L V8 305ci
1977–1978
Oldsmobile Starfire
5.0L V8 305ci
1977–1978
Oldsmobile Starfire
5.0L V8 305ci
1977–1978
Oldsmobile Starfire
5.0L V8 305ci
1975
Pontiac Firebird
6.6L V8 400ci
1975
Pontiac Firebird
5.7L V8 350ci
1975
Pontiac Firebird
5.7L V8 350ci
1975
Pontiac Firebird
5.7L V8 350ci
1975
Pontiac Grand Am
5.7L V8 350ci
1975
Pontiac Grand LeMans
5.7L V8 350ci
1975
Pontiac Ventura
5.7L V8 350ci
1975
Pontiac Ventura
5.7L V8 350ci
1975
Pontiac Ventura
5.7L V8 350ci
1975
Pontiac Ventura
5.7L V8 350ci
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Key Features

Sniper EFI Conversion kit for 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with Rochester 2GC Large Bore Carbs.

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! | • Remove your current carburetor and bolt on the new Sniper EFI system. No intake manifold adapters required! | 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. | Installation of the Sniper EFI 2GC Large Bore throttle body is simple and straightforward: | 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. | • 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!

Sniper EFI Conversion kit for 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with Rochester 2GC Large Bore Carbs.

  • Supports up to 350HP with Two 100lb/hr Injectors
  • 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!
  • High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
  • Installs directly to the factory Rochester 2GC intake manifold, no adapter required
  • Integrated ignition timing control (with Holley Hyperspark, Holley Dual Sync or MSD Pro Billet distributors)
  • Installs directly to the factory Rochester 2GC large bore intake manifold, no adapter required
  • Universal throttle lever with TH350, 700R4 & 200-4R kick down provisions
  • 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
  • Engineered to fit 1974-1978 GM vehicles that utilized the Rochester 2GC large bore carburetor
  • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
  • Bolt on Rochester 2GC large bore two barrel carburetor replacement
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Throttle body mounted ECU – no extra boxes to mount
  • Designed to fit most factory Rochester 2GC large bore air cleaner assemblies
  • Not designed for Tri-Power installations.
  • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
  • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
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About this product

Sniper EFI Conversion kit for 1974-1978 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with Rochester 2GC Large Bore Carbs.

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Product Videos

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Product Specifications

Accelerometer Support
No
Air Metering Style
Speed Density
Automotive Item Grade
Performance
Boost Control
No
Brand
Holley Sniper EFI
California Proposition 65 Chemical Name
4
CAN-BUS Support
No
Category
Air and Fuel Delivery
Coil Per Cylinder Ignition Support
No
Datalogging Support
Yes
Distributor Included
No
Dry Nitrous Control
Yes
E85 Support
No
EGT Support
No
Emission Code
3
Finish
Classic Gold
Forced Induction Support
Yes
Fuel Filter Included
Yes
Fuel Hose Included
Yes
Fuel Injectors Included
Yes
Fuel Pressure Regulator Included
Yes
Fuel Pressure
58.5 PSI
Fuel Pump Flow Rating
240
Fuel Pump Included
Yes
Fuel Pump Type
Inline
Fuel System
Master Kit
Grade Type
Performance
Ignition Timing Control
Yes
Individual Cylinder Fuel Corrections
No
Injector Size
100 lb/hr @ 58.5 PSI
Inlet / Outlet Size
9/16-18 Female O-Ring (AN 6)
Intake Manifold Included
No
Knock Retard Support
No
Multi-Stage Nitrous Control
Yes
Part Type
Fuel Injection Conversion Kit
Product Type
Sniper EFI 2GC Large Bore
Progressive Nitrous Control
Yes
Self-Tuning
Yes
Sub Category
Service Kits
Throttle Position Sensor Included
Yes
Traction Control Support
No
User-Tuneable
Yes
Warning
California Proposition 65
Wet Nitrous Control
Yes
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Warranty & Compliance

Warranty
Manufacturer's Limited 90 Day Warranty
Country of Origin
US
Emissions Code
3
HS Code
8511906040
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Dimensions & Shipping

Product Dimensions
26.6 × 14.8 × 9.7 in
Shipping Dimensions
26.6 × 14.8 × 9.7 in
Weight
6849 g (6.85 kg)