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Description
Holley EFI Dual Sync BBC Tall Deck Distributor - 565-204Overview: 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 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
- Includes both crank and cam sensors to support sequential EFI operation
- Hall Effect sensor design provides precise timing control and noise immunity
- CNC machined billet aluminum housing
- 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 |
|---|---|---|---|---|
| 1991 - 1995 | Chevrolet | C2500 | 454/7.4 V8 | |
| 1992 - 1995 | Chevrolet | C2500 Suburban | 454/7.4 V8 | |
| 1975 - 1986 | Chevrolet | C30 | 454/7.4 V8 | |
| 1988 - 1995 | Chevrolet | C3500 | 454/7.4 V8 | |
| 1970 - 1976 | Chevrolet | Caprice | 454/7.4 V8 | |
| 1975 | Chevrolet | El Camino | Base | 454/7.4 V8 |
| 1976 | Chevrolet | G20 | Beauville | 454/7.4 V8 |
| 1976 | Chevrolet | G20 | Chevy Van | 454/7.4 V8 |
| 1975 - 1996 | Chevrolet | G30 | Beauville | 454/7.4 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 | 427/7 V8 |
| 1970 - 1976 | Chevrolet | Impala | 454/7.4 V8 | |
| 1970 - 1972 | Chevrolet | Impala | 402/6.6 V8 | |
| 1968 - 1969 | Chevrolet | K10 Pickup | 396/6.5 V8 | |
| 1975 - 1986 | Chevrolet | C20 | 454/7.4 V8 | |
| 1973 - 1986 | Chevrolet | C20 Suburban | 454/7.4 V8 | |
| 1990 - 1993 | Chevrolet | C1500 | Cheyenne | 454/7.4 V8 |
| 1990 - 1993 | Chevrolet | C1500 | Silverado | 454/7.4 V8 |
| 1990 - 1993 | Chevrolet | C1500 | 454 SS | 454/7.4 V8 |
| 1990 - 1993 | Chevrolet | C1500 | WT | 454/7.4 V8 |
| 1970 - 1975 | Chevrolet | Bel Air | 454/7.4 V8 | |
| 1976 - 1978 | Chevrolet | K5 Blazer | 454/7.4 V8 | |
| 1975 - 1980 | Chevrolet | C10 | 454/7.4 V8 | |
| 1973 - 1974 | Chevrolet | K10 Pickup | 454/7.4 V8 | |
| 1968 - 1969 | Chevrolet | K10 Suburban | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | K10 Suburban | 402/6.6 V8 | |
| 1973 - 1974 | Chevrolet | K10 Suburban | 454/7.4 V8 | |
| 1968 - 1969 | Chevrolet | K20 Pickup | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | K20 Pickup | 402/6.6 V8 | |
| 1973 - 1974 | Chevrolet | K20 Pickup | 454/7.4 V8 | |
| 1968 - 1969 | Chevrolet | K20 Suburban | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | K20 Suburban | 402/6.6 V8 | |
| 1973 - 1985 | Chevrolet | K20 Suburban | 454/7.4 V8 | |
| 1968 - 1969 | Chevrolet | K30 Pickup | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | K30 Pickup | 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 | |
| 1970 - 1972 | Chevrolet | Kingswood | 454/7.4 V8 | |
| 1970 - 1972 | Chevrolet | Kingswood | 402/6.6 V8 | |
| 1973 - 1975 | Chevrolet | Laguna | 454/7.4 V8 | |
| 1965 - 1967 | Chevrolet | Malibu | 396/6.5 V8 | |
| 1973 - 1980 | Chevrolet | C10 Suburban | 454/7.4 V8 | |
| 1990 | Chevrolet | C1500 | Scottsdale | 454/7.4 V8 |
| 1965 - 1967 | Chevrolet | Chevelle | Base | 396/6.5 V8 |
| 1965 - 1968 | Chevrolet | Chevelle | SS | 396/6.5 V8 |
| 1967 | Chevrolet | Chevelle | Deluxe | 396/6.5 V8 |
| 1967 - 1968 | Chevrolet | Chevelle | Concours | 396/6.5 V8 |
| 1968 | Chevrolet | Chevelle | 300 | 396/6.5 V8 |
| 1968 | Chevrolet | Chevelle | 300 Deluxe | 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 | |
| 1966 - 1970 | Chevrolet | El Camino | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | Camaro | SS | 402/6.6 V8 |
| 1966 - 1969 | Chevrolet | Caprice | 396/6.5 V8 | |
| 1966 - 1969 | Chevrolet | Caprice | 427/7 V8 | |
| 1970 - 1972 | Chevrolet | Caprice | 402/6.6 V8 | |
| 1989 - 1991 | Chevrolet | V3500 | 454/7.4 V8 | |
| 1993 | GMC | K2500 Suburban | SLE | 454/7.4 V8 |
| 1963 - 1 |
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- Free Standard Shipping on $100+ Orders to the USA.
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4.4 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Beauty Quality Excellent Price!
Size: Queen (90x90 Inch), Color: Olive
Wonderful quality blanket! It’s light weight, warm without being heavy, beautiful rich color. Super fast shipping. Came in a smallish box and I was a little worried it would be cheap, but being experienced with items that come with the air sucked out so I waited to see. Sure enough, once the plastic was off it fluffed out and I popped it in the dryer for 5 minutes and all the wrinkles were gone too! I absolutely don’t need a bed spread because the finish looks like expensive silk velvet! I’m buying more for the other bedrooms! I ordered a Queen, olive, 90”x90”, price is incredible and I would have paid double to get this kind of quality!
Love the rich feel and gorgeous color of this blanket. I know they call it olive but it is actually a deep luxurious fern from an untouched dark forest filled with fairy houses and wonderous beings! I’m getting another, sigh…
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Exactly as described
Size: Throw XL (50x70 Inch), Color: Navy
I wanted to get the little longer size, to help cover my feet while I sleep, because I sleep in a recliner due to back issues.
Wow! The material is super soft, and keeps just at the right temperature of warmth at night, so the material breathes well. The extra 10 inches is a godsend now.. My feet stay warm all night long now. So the fit is perfect! The quality of the blanket is great, I’ve had no problems with it. Although my white watch band is now blue.. so I guess the color likes to bleed a bit. I haven’t washed it yet, but I will wash it either alone or with dark colors, because I believe it will bleed its color a bit in the wash & perhaps in the dryer.
Still, with it being so comfortable and soft, I would highly recommend this blanket to everyone!
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Buy it. Truly amazing.
Size: California King (102x96 Inch), Color: Black
It's a bit thinner than I thought and comes in a surprisingly small box but that doesn't matter at all because there's so much blanket and it's super soft, it feels like covering up with a cloud. Perfectly warm, perfectly cool and perfect for sharing the bed with a blanket hog (or your dog babies). Folds up nice and tight for storage too which is always a plus. Buy this, it's worth the price forsure.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Blanket
Size: Twin (60x80 Inch), Color: Grey
This blanket is one of those go-to affordable staples—super soft, lightweight, and perfect if you want something cozy without feeling heavy or bulky.
⸻
👍 What stands out
* Soft microfiber fleece – smooth and cozy against the skin
* Lightweight but warm – good balance for all seasons
* Perfect twin size (60x80) – fits beds, couches, or layering
* Clean, simple design – grey goes with everything
* Durable stitching – double-needle edges help it last longer
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Reviewed in the United States on April 19, 2026
★★★★★ 4
Soft and cozy, sizing seems a bit inconsistent
Size: Queen (90x90 Inch), Color: Sage Green
I actually ordered two of these blankets in two different colors. We had urgent need to add a bed with all new bedding (medical reasons), so I ordered these blankets in a rush. The quality of the blankets seems good. They are very soft and cozy. Lightweight, yet warm. The only issue is that two blankets that should be identical in all ways other than color are actually not even close in size. No matter how hard I try, I cannot get these blankets to line up equally. I really don't like having one blanket hanging lower than the other, especially now that this bed is just inside our front door where every visitor can see it. The king size quilt should in theory cover this discrepancy, but it doesn't fit correctly (another issue). It also means that the blankets are not equally distributed over me and my husband at night. Other than the size inconsistency, I really like these blankets and think they are good value, plenty warm for Wisconsin winters when doubled up with sheets and quilt.
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Reviewed in the United States on February 25, 2026