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Description
Holley EFI Dual Sync SBC/BBC Distributor, Black - 565-200BKOverview: 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 iron 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 |
|---|---|---|---|---|
| 1968 - 1973 | Chevrolet | C20 Pickup | 307/5 V8 | |
| 1973 - 1974 | Chevrolet | C20 Pickup | 454/7.4 V8 | |
| 1969 - 1974 | Chevrolet | C20 Pickup | 350/5.7 V8 | |
| 1968 - 1973 | Chevrolet | C20 Suburban | 307/5 V8 | |
| 1967 - 1969 | Chevrolet | C20 Suburban | 327/5.3 V8 | |
| 1968 - 1969 | Chevrolet | C20 Suburban | 396/6.5 V8 | |
| 1969 - 1986 | Chevrolet | C20 Suburban | 350/5.7 V8 | |
| 1970 - 1972 | Chevrolet | C20 Suburban | 402/6.6 V8 | |
| 1962 - 1968 | Chevrolet | Corvette | 327/5.3 V8 | |
| 1965 | Chevrolet | Corvette | 396/6.5 V8 | |
| 1966 - 1969 | Chevrolet | Corvette | 427/7 V8 | |
| 1968 | Chevrolet | Corvette | 327/5.4 V8 | |
| 1969 - 1986 | Chevrolet | Corvette | 350/5.7 V8 | |
| 1970 - 1974 | Chevrolet | Corvette | 454/7.4 V8 | |
| 1957 - 1958 | Chevrolet | Del Ray | 283/4.6 V8 | |
| 1959 - 1967 | Chevrolet | El Camino | 283/4.6 V8 | |
| 1964 - 1969 | Chevrolet | El Camino | 327/5.3 V8 | |
| 1966 - 1970 | Chevrolet | El Camino | 396/6.5 V8 | |
| 1968 - 1979 | Chevrolet | El Camino | 350/5.7 V8 | |
| 1968 | Chevrolet | El Camino | 327/5.4 V8 | |
| 1968 - 1973 | Chevrolet | El Camino | 307/5 V8 | |
| 1970 - 1976 | Chevrolet | El Camino | 400/6.6 V8 | |
| 1960 - 1967 | Chevrolet | K10 Pickup | 283/4.6 V8 | |
| 1960 - 1967 | Chevrolet | K20 Pickup | 283/4.6 V8 | |
| 1970 - 1974 | Chevrolet | El Camino | 454/7.4 V8 | |
| 1970 - 1972 | Chevrolet | El Camino | 402/6.6 V8 | |
| 1969 - 1972 | Chevrolet | Kingswood | 350/5.7 V8 | |
| 1969 - 1972 | Chevrolet | Kingswood | 307/5 V8 | |
| 1969 | Chevrolet | Kingswood | 327/5.3 V8 | |
| 1969 | Chevrolet | Kingswood | 396/6.5 V8 | |
| 1969 | Chevrolet | Kingswood | 427/7 V8 | |
| 1970 - 1972 | Chevrolet | Kingswood | 400/6.6 V8 | |
| 1970 - 1972 | Chevrolet | Kingswood | 454/7.4 V8 | |
| 1970 - 1972 | Chevrolet | Kingswood | 402/6.6 V8 | |
| 1973 - 1976 | Chevrolet | Laguna | 400/6.6 V8 | |
| 1973 - 1976 | Chevrolet | Laguna | 350/5.7 V8 | |
| 1969 - 1985 | Chevrolet | Impala | 350/5.7 V8 | |
| 1970 - 1976 | Chevrolet | Impala | 400/6.6 V8 | |
| 1970 - 1976 | Chevrolet | Impala | 454/7.4 V8 | |
| 1968 - 1973 | Chevrolet | Impala | 307/5 V8 | |
| 1970 - 1972 | Chevrolet | Impala | 402/6.6 V8 | |
| 1966 - 1969 | Chevrolet | K10 Pickup | 327/5.3 V8 | |
| 1968 | Chevrolet | K10 Pickup | 327/5.4 V8 | |
| 1968 - 1973 | Chevrolet | K10 Pickup | 307/5 V8 | |
| 1968 - 1969 | Chevrolet | K10 Pickup | 396/6.5 V8 | |
| 1969 - 1974 | Chevrolet | K10 Pickup | 350/5.7 V8 | |
| 1970 - 1972 | Chevrolet | K10 Pickup | 402/6.6 V8 | |
| 1969 - 1974 | GMC | K15/K1500 Pickup | 350/5.7 V8 | |
| 1968 - 1973 | GMC | K15/K1500 Pickup | 307/5 V8 | |
| 1970 - 1972 | GMC | K15/K1500 Pickup | 402/6.6 V8 | |
| 1973 - 1974 | GMC | K15/K1500 Pickup | 454/7.4 V8 | |
| 1968 | GMC | K15/K1500 Suburban | 327/5.4 V8 | |
| 1968 - 1973 | GMC | K15/K1500 Suburban | 307/5 V8 | |
| 1968 - 1969 | GMC | K15/K1500 Suburban | 396/6.5 V8 | |
| 1967 - 1968 | GMC | K15/K1500 Suburban | 327/5.3 V8 | |
| 1969 - 1974 | GMC | K15/K1500 Suburban | 350/5.7 V8 | |
| 1970 - 1972 | GMC | K15/K1500 Suburban | 402/6.6 V8 | |
| 1973 - 1974 | GMC | K15/K1500 Suburban | 454/7.4 V8 | |
| 1967 | GMC | K25/K2500 Pickup | 283/4.6 V8 | |
| 1967 - 1968 | GMC | K25/K2500 Pickup | 327/5.3 V8 | |
| 1968 | GMC | K25/K2500 Pickup | 327/5.4 V8 | |
| 1968 - 1973 | GMC | K25/K2500 Pickup | 307/5 V8 | |
| 1968 - 1969 | GMC | K25/K2500 Pickup | 396/6.5 V8 | |
| 1969 - 1974 | GMC | K25/K2500 Pickup | 350/5.7 V8 | |
| 1970 - 1972 | GMC | K25/K2500 Pickup | 402/6.6 V8 | |
| 1959 | Chevrolet | 3F | 283/4.6 V8 | |
| 1959 | Chevrolet | 3G | 283/4.6 V8 | |
| 1959 - 1961 | Chevrolet | Kingswood | 283/4.6 V8 | |
| 1957 - 1961 | Chevrolet | Nomad | 283/4.6 V8 | |
| 1959 - 1961 | Chevrolet | Parkwood | 283/4.6 V8 | |
| 1956 - 1959 | GMC | 100 | 322/5.3 V8 | |
| 1958 - 1959 | GMC | 100 | 337/5.5 V8 | |
| 1956 - 1959 | GMC | 150 | 322/5.3 V8 | |
| 1958 - 1959 | GMC | 150 | 337/5.5 V8 | |
| 1956 - 1959 | GMC | 250 |
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4.7 ★★★★★
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Product Reviews
★★★★★ 5
Excellent product for dry mouth
Scent Name: Berry, Size: 100 Count
If you are having trouble with dry mouth, especially while sleeping, this is definitely the product for you. I have severe dry mouth and have tried multiple things including hard candy (yes, I know not very smart) as well as different biotin products, the mouthwash, the spray and the gel, which all do work, but do not last for very long. These stay in place open the corner of your mouth, last for hours and truly work. I highly recommend it if you are having a dry mouth issue
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
★★★★★ 5
Works great
Scent Name: Berry, Size: 100 Count
I have to use these for about 1/2 a year. I keep bronchitis and sinusitis from about Oct. to April every since I was a child. When I am suffering with these I can't breath through my nose, epically at night while sleeping and would wake up several times a night with dry mouth so bad ir was literally painful. My mom turned me on to these because she was using the with her CPAP. I sometimes have a bit of difficulty getting them to stay put but overall they are great. I have tried the OG, cinnamon, and berry. The OG have no real taste, but you wake up with a sweet taste in your mouth. I tried the cinnamon because I love cinnamon and didn't listen to the reviews stating how strong the flavor is, big regret, it's like putting two or three fireballs in your mouth, won't be making that mistake again. The berry ones are actually best in my opinion. They have a light berry flavor that isn't overpowering, isn't quite as sweet as the OG. Whichever one you choose you won't wake up in pain. I do suggest using only one at first as opposed to the two they recommend, unless you like waking up with your head on a water logged pillow. One generally gets me through the night unless my congestion is super bad, then I will sometimes have to use a 2nd one about 1/2 way through my night when I wake up for the bathroom and realize it's already completely dissolved.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 21, 2025
★★★★★ 5
Get traction in your life work
Format: Paperback
This book is the best book I've read this year, giving concrete ideas on how to get more, I do mean more, in your life. Whatever your passion, be it starting a business, or in his case businesses, hobbies, relationships.
One exercise Koch suggests is coming up with a list of your 10 best friends and rate them 1-10 (that in itself was fascinating) then put a percentage next to each friend. Are you spending the right amount of time with your closest, or more time with those less dear to you?
His many insights will lead you in new ways to think about your life, your business, your family and friends.
If you want to find new ways to think about your life, if you are in a rut and can't figure out what to do, if you are like me always busy and sometimes wondering am I doing the right things--this is a book for you.
Richard Koch has written on this subject before and this is the best book for the individual.
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Reviewed in the United States on February 21, 2011
★★★★★ 5
Great Book
Format: Kindle
Excellent points to consider in leadership. The 80/20 principle is a great read for leaders everywhere. I liked the book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2012
★★★★★ 4
Interesting Follow Up to the 80/20 Principle
Format: Paperback
If you enjoyed the 80/20 Principle this is a good guide to applying it in your life. He does make some bold predictions like highly competent individuals will soon make public corporations obsolete. Some of this book is highly speculative and other parts are very practical. Luckily it is pretty easy to tell which is which. Very interesting book.
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Reviewed in the United States on July 14, 2012