Holley EFI Cam Sync Kit 12mm Flying Magnet — Fits Big Block Chevy Raised Cam

SKU: GVMR_556-121
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About Holley EFI Holley EFI engineers high-quality automotive parts and ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Sync for Raised Cam Big Block Chevy

For Big Block Chevy builds featuring a raised camshaft (0.600 to 1.000 inches), standard cam sync systems often fall short. This Holley EFI Cam Sync Kit is specifically engineered to bridge that gap, providing the exact sensor placement and alignment needed for high-performance sequential EFI setups.

Kit Highlights

  • Fits Big Block Chevy with +0.600 to +1.000 raised cam
  • Includes precision-machined mounting bracket
  • High-accuracy flying magnet target
  • 12mm x 1.00 thread sensor
  • Ensures perfect sequential injection timing

Raised cam engines present unique challenges for ignition and fuel timing, but this kit makes synchronization simple and effective. By providing a dedicated mounting solution for the cam sensor, you ensure that your Holley EFI system receives a clean, reliable signal regardless of the engine's deck height or cam placement. This is essential for preventing timing errors and maximizing the efficiency of your high-output BBC engine. The kit includes everything you need to mount the sensor securely, allowing for a professional installation that stands up to the rigors of drag racing and high-performance street use. Don't compromise your engine's potential with improper timing signals. Trust the specialized engineering of Holley EFI to keep your Big Block Chevy performing at the top of its game. Get the best in engine management hardware at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Sync for Raised Cam Big Block Chevy

For Big Block Chevy builds featuring a raised camshaft (0.600 to 1.000 inches), standard cam sync systems often fall short. This Holley EFI Cam Sync Kit is specifically engineered to bridge that gap, providing the exact sensor placement and alignment needed for high-performance sequential EFI setups.

Kit Highlights

  • Fits Big Block Chevy with +0.600 to +1.000 raised cam
  • Includes precision-machined mounting bracket
  • High-accuracy flying magnet target
  • 12mm x 1.00 thread sensor
  • Ensures perfect sequential injection timing

Raised cam engines present unique challenges for ignition and fuel timing, but this kit makes synchronization simple and effective. By providing a dedicated mounting solution for the cam sensor, you ensure that your Holley EFI system receives a clean, reliable signal regardless of the engine's deck height or cam placement. This is essential for preventing timing errors and maximizing the efficiency of your high-output BBC engine. The kit includes everything you need to mount the sensor securely, allowing for a professional installation that stands up to the rigors of drag racing and high-performance street use. Don't compromise your engine's potential with improper timing signals. Trust the specialized engineering of Holley EFI to keep your Big Block Chevy performing at the top of its game. Get the best in engine management hardware at GGCRACING.

Product Details

Product Description

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Precision Sync for Raised Cam Big Block Chevy

For Big Block Chevy builds featuring a raised camshaft (0.600 to 1.000 inches), standard cam sync systems often fall short. This Holley EFI Cam Sync Kit is specifically engineered to bridge that gap, providing the exact sensor placement and alignment needed for high-performance sequential EFI setups.

Kit Highlights

  • Fits Big Block Chevy with +0.600 to +1.000 raised cam
  • Includes precision-machined mounting bracket
  • High-accuracy flying magnet target
  • 12mm x 1.00 thread sensor
  • Ensures perfect sequential injection timing

Raised cam engines present unique challenges for ignition and fuel timing, but this kit makes synchronization simple and effective. By providing a dedicated mounting solution for the cam sensor, you ensure that your Holley EFI system receives a clean, reliable signal regardless of the engine's deck height or cam placement. This is essential for preventing timing errors and maximizing the efficiency of your high-output BBC engine. The kit includes everything you need to mount the sensor securely, allowing for a professional installation that stands up to the rigors of drag racing and high-performance street use. Don't compromise your engine's potential with improper timing signals. Trust the specialized engineering of Holley EFI to keep your Big Block Chevy performing at the top of its game. Get the best in engine management hardware at GGCRACING.

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