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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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4.5 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 1
Don't try to save $$ when buying pillows. Better to sleep happy!
Size: Standard (2 Pillows + 2 Protectors), Style: Soft, Configuration: Pillows + Protectors, Size: Standard (2 Pillows + 2 Protectors), Style: Soft, Configuration: Pillows + Protectors
Instead of purchasing what I was looking for I went with the Amazon variation and I'll think twice before doing that again. The reviews for this pillow said that it was "soft" (not FIRM) and good for side sleepers. Now imagine a pillow that you have to inflate, and you fill it to maximum capacity, then try to sleep on that balloon! It barely gives when you lay on it and is FIRM! Go with your gut and don't try and save a few bucks when you buy something as important as a pillow. Unfortunately they were vacuum packed and I don't think I can return them. They inflated quite a bit and it would be a pretty big hassle. Someone is getting a gift of 2 very firm pillows!
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Reviewed in the United States on April 28, 2025
★★★★★ 5
The best pillow I've ever had!
Size: King (U.S. Standard), Number of Items: 2
I have tried a LOT of pillows over the years. I'm allergic to feathers so I need something non-allergenic. I am a back and side sleeper, and all of the pillows I've tried have gone flat after just a few weeks. Well I've had these for a couple of months now, and they show no sign of flatness whatsoever. A few punches or a fluff cycle in my dryer each week plumps them right up. They are just the right kind of firmness -- enough give so that I'm not kinking my neck, but not too much give so that my head ends up on the mattress by morning. I just cannot say enough good things about these pillows. I'm so excited that I finally found one that is perfect for me.
As others have said, they arrive vacuum packed. They look a bit weird, and it will make you wonder how they will ever fluff up from how flat they are when they arrive. But look at it as an opportunity to take out your frustrations lol. Whack them on a wall, punch the bejeebers out of them, it will make you feel good and it will inflate them right up. Or throw them in the dryer like I did and in 15 minutes you will have a perfectly fluffy pillow.
All in all, I highly recommend these. The price point is so reasonable, and they seem to be well made. Five stars all around.
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Reviewed in the United States on January 19, 2025
★★★★★ 5
Updated: actually very good pillows for the price
Size: King (U.S. Standard), Number of Items: 2
Wow! It is amazing at how compact these arrive in their package... it actually was a bit of work to get them out of the packaging it was so tight. Once out, they immediately began to "size up" and within about 15 minutes had reached maximum size.
They are comfortable pillows, but lack the firmness that I wanted. On a scale of 1-5, I'd rate them 3 at the most, possible a 2 if 5 is maximum firmness.
Updated: After about a month or so of having these, I have to admit my initial impressions were flat out wrong... these are fantastic... comfortable and more firm than I initially thought... probably 4-4.5 out of 5 on the firmness scale now. Maybe they just take a while to decompress? Anyway, would now definitely recommend!
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Reviewed in the United States on April 25, 2025
★★★★★ 4
Not firm. But nice and fluffy
Size: King (U.S. Standard), Number of Items: 2
Very fluffy. Not firm.
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Reviewed in the United States on August 9, 2025
★★★★★ 5
Great pillows
Size: King (U.S. Standard), Number of Items: 4
These pillows are a must buy. Very soft and sturdy. It feels like a cloud when I lay on them. And I love how long they are too. The price for the amount was a huge bonus too.
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Reviewed in the United States on April 21, 2026