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Holley EFI 565-204BK - Holley EFI Dual Sync BBC Tall Deck Distributor, Black

Introducing the next generation of Holley EFI Dual Sync Distributors, the new design features an improved shutter wheel, high-quality dual Hall Effect sensors, and an MSD cap and rotor!

While these distributors are designed to be used primarily in sequentially injected installations, you can easily use them as a crank trigger for TBI system also. The precision machined shutter wheel design ensures accurate timing, even at very high engine speeds. The Black anodized Gen 2 Dual Sync also included a QPQ coated shutter wheel for superior corrosion resistance, and the wheel has been pinned and welded to the shaft for increased reliability. These distributors can also be used with other EFI systems that support Hall Effect crank and cam sensor inputs. Do you need to a bronze gear for your billet cam? No problem, these distributors maintain MSD shaft diameters, making it easy to source a bronze gear!
Availability: Call to check stock.
Shipping: Free Shipping* On Orders Over $99!
Pricing: $407.95

Free U.S. Continental Shipping


Plug and Play with Holley EFI and Sniper EFI with adapter harness part number 558-493
Includes both crank and cam sensors to support sequential EFI operation
Hall Effect sensor design provides precise timing control and noise immunity
Black anodized CNC machined billet aluminum housing provides superior strength and great looks
Integrated LEDs allow for easy setup
Available for popular applications
Comes with hardened steel distributor gear
Precision machined shutter wheel designed for improved accuracy at extreme engine RPM
Shutter wheel is pinned and welded to distributor shaft for superior reliability
Blank cap available for Coil-On-Plug applications

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


When utilized with Sniper EFI, Ignition Adapter 558-493 is Required!


  • 565-204BK
  • 565-204BK
  • 090127038420
  • Holley EFI
  • Call to check stock.
  • New


Shipping Information

  • Item Requires Shipping
  • 4.0 lbs.
  • W4.7500” x H12.0000” x L4.7500”
  • Free U.S. Continental Shipping
  • Free Shipping* On Orders Over $99!


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