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Description
Holley EFI Dual Sync Ford 351W Distributor - 565-201Overview: 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 |
|---|---|---|---|---|
| 1978 - 1985 | Ford | Bronco | 351/5.8 V8 | |
| 1975 - 1982 | Ford | LTD | Base | 351/5.8 V8 |
| 1975 - 1978 | Ford | LTD | Landau | 351/5.8 V8 |
| 1975 - 1976 | Ford | LTD | Brougham | 351/5.8 V8 |
| 1969 - 1981 | Ford | LTD | 351/5.8 V8 | |
| 1975 - 1977 | Ford | Custom 500 | Base | 351/5.8 V8 |
| 1975 - 1983 | Ford | E-100 Econoline | 351/5.8 V8 | |
| 1975 - 1983 | Ford | E-100 Econoline Club Wagon | 351/5.8 V8 | |
| 1975 - 1985 | Ford | E-150 Econoline | 351/5.8 V8 | |
| 1975 - 1985 | Ford | E-150 Econoline Club Wagon | 351/5.8 V8 | |
| 1975 - 1985 | Ford | E-250 Econoline | 351/5.8 V8 | |
| 1971 - 1979 | Mercury | Cougar | 351/5.8 V8 | |
| 1970 - 1974 | Mercury | Monterey | 351/5.8 V8 | |
| 1975 - 1976 | Ford | Elite | 351/5.8 V8 | |
| 1987 - 1991 | Ford | LTD Crown Victoria | Base | 351/5.8 V8 |
| 1969 - 1972 | Ford | Custom | 351/5.8 V8 | |
| 1969 - 1971 | Mercury | Cyclone | 351/5.8 V8 | |
| 1971 - 1981 | Mercury | Marquis | 351/5.8 V8 | |
| 1969 - 1976 | Mercury | Montego | 351/5.8 V8 | |
| 1977 - 1985 | Ford | E-350 Econoline Club Wagon | 351/5.8 V8 | |
| 1977 - 1979 | Ford | F-100 | 351/5.8 V8 | |
| 1977 - 1985 | Ford | F-150 | 351/5.8 V8 | |
| 1982 | Ford | LTD | S | 351/5.8 V8 |
| 1982 - 1984 | Ford | LTD | Crown Victoria | 351/5.8 V8 |
| 1983 - 1984 | Ford | LTD | Country Squire | 351/5.8 V8 |
| 1977 | Ford | LTD II | S | 351/5.8 V8 |
| 1977 | Ford | LTD II | Base | 351/5.8 V8 |
| 1977 | Ford | LTD II | Brougham | 351/5.8 V8 |
| 1977 | Ford | LTD II | Squire | 351/5.8 V8 |
| 1978 - 1979 | Ford | LTD II | 351/5.8 V8 | |
| 1995 | Ford | Mustang | SVT Cobra R | 351/5.8 V8 |
| 1969 - 1979 | Ford | Ranchero | 351/5.8 V8 | |
| 1977 | Ford | Ranchero | GT | 351/5.8 V8 |
| 1977 | Ford | Ranchero | 500 | 351/5.8 V8 |
| 1977 | Ford | Ranchero | Squire | 351/5.8 V8 |
| 1977 - 1979 | Ford | Thunderbird | 351/5.8 V8 | |
| 1972 - 1976 | Ford | Torino | 351/5.8 V8 | |
| 1980 | Lincoln | Continental | 351/5.8 V8 | |
| 1980 | Lincoln | Mark VI | 351/5.8 V8 | |
| 1977 | Lincoln | Versailles | 351/5.8 V8 | |
| 1978 - 1981 | Mercury | Grand Marquis | 351/5.8 V8 | |
| 1983 - 1989 | Mercury | Grand Marquis | Base | 351/5.8 V8 |
| 1986 | Mercury | Grand Marquis | Colony Park | 351/5.8 V8 |
| 1969 - 1977 | Mercury | Cougar | Base | 351/5.8 V8 |
| 1977 | Mercury | Cougar | Brougham | 351/5.8 V8 |
| 1977 | Mercury | Cougar | Villager | 351/5.8 V8 |
| 1969 - 1977 | Mercury | Cougar | XR-7 | 351/5.8 V8 |
| 1975 - 1977 | Mercury | Monarch | 351/5.8 V8 | |
| 1975 | Mercury | Montego | Base | 351/5.8 V8 |
| 1975 | Mercury | Montego | Brougham | 351/5.8 V8 |
| 1975 | Mercury | Montego | Villager | 351/5.8 V8 |
| 1975 | Mercury | Montego | MX | 351/5.8 V8 |
| 1969 - 1974 | Ford | Country Sedan | 351/5.8 V8 | |
| 1993 - 1995 | Ford | F-150 | Lightning | 351/5.8 V8 |
| 1977 - 1985 | Ford | F-250 | 351/5.8 V8 | |
| 1977 - 1985 | Ford | F-350 | 351/5.8 V8 | |
| 1972 - 1976 | Ford | Gran Torino | 351/5.8 V8 | |
| 1975 - 1977 | Ford | Granada | 351/5.8 V8 | |
| 1969 - 1971 | Ford | Torino | Base | 351/5.8 V8 |
| 1969 - 1971 | Ford | Torino | GT | 351/5.8 V8 |
| 1969 - 1971 | Ford | Torino | Squire | 351/5.8 V8 |
| 1970 - 1971 | Ford | Torino | Brougham | 351/5.8 V8 |
| 1971 | Ford | Torino | 500 | 351/5.8 V8 |
| 1969 | Mercury | Comet | 351/5.8 V8 | |
| 1975 - 1985 | Ford | E-250 Econoline Club Wagon | 351/5.8 V8 | |
| 1975 - 1985 | Ford | E-350 Econoline | 351/5.8 V8 | |
| 1971 | Ford | Torino | Cobra | 351/5.8 V8 |
| 1969 - 1974 | Mercury | Colony Park | 351/5.8 V8 | |
| 1969 - 1972 | Ford | Mustang | Base | 351/5.8 V8 |
| 1969 - 1970 | Ford | Mustang | Shelby GT-350 | 351/5.8 V8 |
| 1970 - 1972 | Ford | Mustang | Mach 1 | 351/5.8 V8 |
| 1970 - 1972 | Ford | Mustang | Grande | 351/5.8 V8 |
| 1971 | Ford | Mustang | Boss 351 | 351/5.8 V8 |
| 1973 | Ford | Mustang | 351/5.8 V8 | |
| 1969 - 1974 | Ford | Ranch Wagon | 351/5.8 V8 | |
| 1969 - 1974 | Ford | Country Squire | 351/5.8 V8 | |
| 1969 - 1974 | Ford | Custom 500 | 351/5.8 V8 | |
| 1969 - 1970 | Ford | Fairlane |
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- Free Standard Shipping on $100+ Orders to the USA.
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4.8 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Aggressive chewer approved
Size: Large, Number of Items: 1, Size: Large, Number of Items: 1
Got this to help amuse my 90lb GSD while I was out of town for a month. He gets one meal a day in it, and really enjoys the work. It’s easy, not a puzzle, no frustration, just a “job.” He chewed on the yellow top pretty aggressively while I was gone, and it still works fine. This is a dog that destroys even the most durable chew toys in minutes to hours when he’s anxious, and I imagine he experienced some anxiety while I was gone especially during periods when he was alone. So, I’m quite pleased with the durability. This will definitely stay in the meal service rotation and I will replace it if necessary. One thing to note: the fill hole is pretty small. His kibble is small enough that one might think it would easily pour right in, but no. At some point I’ll get annoyed enough to pull out my drill and make that hole larger.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
Good product, fun distraction
Size: Large, Number of Items: 1
Honestly great and keeps them entertained while eating. Have a 5 month old pupper who chews and destroys. This is a fun distraction
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Reviewed in the United States on May 27, 2026
★★★★★ 5
My dog loves it
Color: 1 PC-Beef-Red, Color: 1 PC-Beef-Red
The bone arrived today and my dog loves it.
He is a very aggressive chewer and destroyed almost all his toys so far, even toys that were advertised for aggressive chewers unfortunately didn't held out long, the longest so far was a stuffy we couldn't find anymore and that one lasted him a few weeks but everything else lasted him an hour up to a few days max, even bones don't last him long so we have our hopes set on this bone to satisfy his chewing needs.
I will update my review later on sturdiness, since we just got it and I can't review that yet but so far he loves it he has been chewing on it non stop, he already managed to get very small pieces of as shown in picture but with a regular bone he would've already been much much further.
The bone is only 10 bucks so the value for money you get based on my experience so far is amazing! But also for this I will come back later to touch upon more.
The size is good, our boy is a medium sized dog and this bone was advertised for medium to large size dogs and I thinks the size is just right for our boy .
And there is definitely a beef flavor on it you can smell it but it doesn't smell bad it's a nice smell and not very strong but when he is chewing on it you smell it.
I would based on my experience so far definitely recommend this bone but also on this I will touch back upon later if it's worth it in the long run.
So far a very happy dog and owners here.
Edit on May 8th (original review was on March 11th)
He still hasn't managed to destroy it it's the first (cgew)toy he hasn't managed to destroy yet which is very impressive since he managed to destroy the even most toughest things we got for him in a week tops and bones within 1, 2 days tops, so we are very happy and pleased with this bone and will definitely get more later.
He still enjoys chewing on it and leaves our things mostly alone for some reason he just likes stealing my things and chew on it lol.
So 2 months later still stand by recommending this when your dog loves to chew and destroys everything he puts his mouth on.
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Reviewed in the United States on March 11, 2026
★★★★★ 5
Extremely durable, dogs love them
Color: 2 PC-Beef-Red, Color: 2 PC-Beef-Red
I was looking for the toughest and most durable dog chew bone I could find and this is it. I have bought multiple other brands that claim to be very durable and tough for a very long time and this is the one for sure. The shower has described this phone accurately and it truly does last. I purchased this bone about 2 months ago. As you see from the photos attached, this is a very well made chew bone and my aggressive pitbulls can't tear it apart do they try. They never get tired of it and chewing it every single day for hours on and keeping them very occupied. I have two bones and three pitbulls that chew on it every day. It is so adorable and has an awesome flavor to it which I think entices them even more to want to chew on it. The durability and Lasting power is amazing to me with these tough chewers. I highly recommend this product to everyone out there. I will say only one negative and that is that the middle wraparound piece they were able to pull off but that is not a big deal because there is plenty of bone which was under that cover in the middle of the bone. There's a few mauled chips missing from the ends but the life of this bone is obviously going to be a long time which really surprised me. Give it a shot if you have heavy duty chewers and you will find how awesome this phone really is and it's durability and strength our second to none in my opinion.
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Reviewed in the United States on September 5, 2025
★★★★★ 5
My dog loves it.
Color: 1 PC-Beef-Red
My dog is a super aggressive chewer when it comes to toys. Anything that is soft he rips apart. This one has a wonderful squeaky sound that makes him happy and he enjoys the smell of it. This is a very strong material and definitely worth the price.
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Reviewed in the United States on May 10, 2026
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