SKU: 87099269125

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

Sale price$304.18 Regular price$337.98
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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Description

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

Overview:

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!

Features:

  • 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

Application:

Year Make Model Submodel Engine Size
1970 - 1972 Chevrolet Kingswood 402/6.6 V8
1970 - 1972 Chevrolet Kingswood 454/7.4 V8
1973 - 1975 Chevrolet Laguna 454/7.4 V8
1991 - 1995 Chevrolet K2500 454/7.4 V8
1992 - 1995 Chevrolet K2500 Suburban 454/7.4 V8
1977 - 1986 Chevrolet K30 454/7.4 V8
1988 - 1995 Chevrolet K3500 454/7.4 V8
1975 Chevrolet Malibu Classic 454/7.4 V8
1970 - 1975 Chevrolet Monte Carlo 454/7.4 V8
1988 Chevrolet R20 Cheyenne 454/7.4 V8
1988 Chevrolet R20 Custom Deluxe 454/7.4 V8
1988 Chevrolet R20 Scottsdale 454/7.4 V8
1988 Chevrolet R20 Silverado 454/7.4 V8
1987 Chevrolet R20 454/7.4 V8
1987 - 1988 Chevrolet R20 Suburban 454/7.4 V8
1989 Chevrolet R2500 454/7.4 V8
1989 - 1991 Chevrolet R2500 Suburban 454/7.4 V8
1987 - 1988 Chevrolet R30 454/7.4 V8
1989 - 1991 Chevrolet R3500 454/7.4 V8
1987 - 1988 Chevrolet V20 Suburban 454/7.4 V8
1990 Chevrolet V2500 Suburban 454/7.4 V8
1987 - 1988 Chevrolet V30 454/7.4 V8
1989 - 1991 Chevrolet V3500 454/7.4 V8
1993 GMC K2500 Suburban SLE 454/7.4 V8
1963 - 1969 Chevrolet Bel Air 427/7 V8
1965 - 1969 Chevrolet Bel Air 396/6.5 V8
1970 - 1975 Chevrolet Bel Air 454/7.4 V8
1970 - 1972 Chevrolet Bel Air 402/6.6 V8
1973 - 1974 Chevrolet K30 Pickup 454/7.4 V8
1969 Chevrolet Kingswood 396/6.5 V8
1969 Chevrolet Kingswood 427/7 V8
1966 - 1969 Chevrolet Caprice 427/7 V8
1966 - 1969 Chevrolet Caprice 396/6.5 V8
1968 Chevrolet Chevelle Malibu 396/6.5 V8
1968 Chevrolet Chevelle Nomad 396/6.5 V8
1969 - 1970 Chevrolet Chevelle 396/6.5 V8
1970 - 1973 Chevrolet Chevelle 454/7.4 V8
1970 - 1972 Chevrolet Chevelle 402/6.6 V8
1968 Chevrolet Chevy II 396/6.5 V8
1965 Chevrolet Corvette 396/6.5 V8
1966 - 1969 Chevrolet Corvette 427/7 V8
1970 - 1974 Chevrolet Corvette 454/7.4 V8
1970 Chevrolet Estate 454/7.4 V8
1971 - 1972 Chevrolet Camaro Base 402/6.6 V8
1970 - 1972 Chevrolet Camaro SS 402/6.6 V8
1972 Chevrolet Camaro Z28 402/6.6 V8
1973 - 1980 Chevrolet C10 Suburban 454/7.4 V8
1968 - 1969 Chevrolet C20 Pickup 396/6.5 V8
1970 - 1972 Chevrolet C20 Pickup 402/6.6 V8
1973 - 1974 Chevrolet C20 Pickup 454/7.4 V8
1968 - 1969 Chevrolet C20 Suburban 396/6.5 V8
1970 - 1972 Chevrolet C20 Suburban 402/6.6 V8
1976 - 1978 Chevrolet K5 Blazer 454/7.4 V8
1975 - 1980 Chevrolet C10 454/7.4 V8
1973 - 1986 Chevrolet C20 Suburban 454/7.4 V8
1968 - 1969 Chevrolet C30 Pickup 396/6.5 V8
1970 - 1972 Chevrolet C30 Pickup 402/6.6 V8
1973 - 1974 Chevrolet C30 Pickup 454/7.4 V8
1967 Chevrolet Camaro Base 396/6.5 V8
1967 Chevrolet Camaro RS 396/6.5 V8
1967 - 1969 Chevrolet Camaro SS 396/6.5 V8
1969 Chevrolet Camaro Base 427/7 V8
1969 Chevrolet Camaro RS 427/7 V8
1966 - 1970 Chevrolet El Camino 396/6.5 V8
1970 - 1974 Chevrolet El Camino 454/7.4 V8
1970 - 1972 Chevrolet El Camino 402/6.6 V8
1973 - 1974 Chevrolet G10 Van Base 454/7.4 V8
1973 - 1974 Chevrolet G20 Van 454/7.4 V8
1973 - 1974 Chevrolet G30 Van Base 454/7.4 V8
1963 - 1969 Chevrolet Impala 427/7 V8
1965 - 1969 Chevrolet Impala 396/6.5 V8
1966 - 1967 Chevrolet Impala Base 396/6.5 V8
1966 - 1967 Chevrolet Impala Base 427/7 V8
1966 - 1967 Chevrolet Impala SS 396/6.5 V8
1966 - 1967 Chevrolet Impala SS
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 87099269125

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Christy F
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Cait E
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Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed. I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood). Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025
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Maggie Vega
Belleville, US
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
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Reviewed in the United States on May 15, 2026
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Kira Stewart
Houston, US
★★★★★ 5
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Size: Medium, Color: (659) Fuchsia Dusk / Fuchsia Dusk / Tourmaline Pink
Very comfortable. True to size. Moisture wicking
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Reviewed in the United States on April 25, 2026
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Theresa
Omaha, US
★★★★★ 4
No show but stays on
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I wear these socks daily. They truly don’t show with my workout shoes or with hey dudes. But the best thing about them is that they actually stay on your foot. I work out hard and I don’t ever have to pull them up. I do wish they were just a little bit thicker than they are, but they are definitely a product I will buy again.
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