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Ships within 48 hours · Estimated delivery Sep 22 - Sep 27
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Description
EFI Crank Trigger Kit - 556-113Overview: Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most demanding, high horsepower, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4 Magnet, MSD "style" Crank trigger. It is designed for use on early model BBC Chevy applications using a standard ATI or Fluidamper "style" balancer up to 7 1 4" in
Overview:
Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high horsepower, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4-Magnet, MSD "style" Crank trigger. It is designed for use on early model BBC Chevy applications using a standard ATI or Fluidamper "style" balancer up to 7-1/4" in diameter.
Features:
- 8” diameter, 1/4” thick, billet steel, 36-1 tooth, crank wheel with Black Zinc Oxide finish for superior corrosion resistance & striking good looks.
- Crank wheel centers off of the balancer’s hub, eliminating the need for a centering ring
- All billet, 6061-T6 aluminum sensor mounting brackets with “bright-dipped” black anodized finish & Laser etched Holley EFI logo
- Custom 3-wire, ferrous-target, Hall-effect sensor with M12X1mm threads for finer gap adjustment
- All Grade 8 & Mil. Spec mounting hardware
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1970 - 1972 | GMC | K25/K2500 Pickup | 402/6.6 V8 | |
| 1973 - 1974 | GMC | K25/K2500 Pickup | 454/7.4 V8 | |
| 1968 - 1969 | GMC | K25/K2500 Suburban | 396/6.5 V8 | |
| 1970 - 1972 | GMC | K25/K2500 Suburban | 402/6.6 V8 | |
| 1973 - 1974 | GMC | K25/K2500 Suburban | 454/7.4 V8 | |
| 1968 - 1969 | GMC | K35/K3500 Pickup | 396/6.5 V8 | |
| 1970 - 1972 | GMC | K35/K3500 Pickup | 402/6.6 V8 | |
| 1973 - 1974 | GMC | K35/K3500 Pickup | 454/7.4 V8 | |
| 1970 - 1971 | GMC | P25/P2500 Van | 454/7.4 V8 | |
| 1970 - 1974 | GMC | P35/P3500 Van | 454/7.4 V8 | |
| 1971 - 1975 | GMC | Sprint | 454/7.4 V8 | |
| 1971 - 1975 | GMC | Sprint | 402/6.6 V8 | |
| 1970 - 1972 | Chevrolet | Brookwood | 402/6.6 V8 | |
| 1970 - 1972 | Chevrolet | Brookwood | 454/7.4 V8 | |
| 1965 - 1969 | Chevrolet | Biscayne | 396/6.5 V8 | |
| 1963 - 1969 | Chevrolet | Biscayne | 427/7 V8 | |
| 1970 - 1972 | Chevrolet | Biscayne | 454/7.4 V8 | |
| 1970 - 1972 | Chevrolet | Biscayne | 402/6.6 V8 | |
| 1973 - 1974 | Chevrolet | Blazer | 454/7.4 V8 | |
| 1969 | Chevrolet | Brookwood | 396/6.5 V8 | |
| 1969 | Chevrolet | Brookwood | 427/7 V8 | |
| 1968 - 1969 | Chevrolet | C10 Pickup | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | C10 Pickup | 402/6.6 V8 | |
| 1973 - 1974 | Chevrolet | C10 Pickup | 454/7.4 V8 | |
| 1968 - 1969 | Chevrolet | C10 Suburban | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | C10 Suburban | 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 | |
| 1973 - 1985 | 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 | |
| 1980 - 1985 | GMC | B6000 | 427/7 V8 | |
| 1965 - 1969 | Pontiac | Beaumont | 396/6.5 V8 | |
| 1965 - 1969 | Pontiac | Strato-Chief | 396/6.5 V8 | |
| 1966 - 1969 | Pontiac | Laurentian | 396/6.5 V8 | |
| 1966 - 1969 | Pontiac | Parisienne | 396/6.5 V8 | |
| 1969 | Chevrolet | Estate | 396/6.5 V8 | |
| 1969 | Chevrolet | Estate | 427/7 V8 | |
| 1970 | Chevrolet | Estate | 402/6.6 V8 | |
| 1970 | Chevrolet | Estate | 454/7.4 V8 | |
| 1970 | Pontiac | Laurentian | 454/7.4 V8 | |
| 1970 | Pontiac | Parisienne | 454/7.4 V8 | |
| 1970 | Pontiac | Strato-Chief | 454/7.4 V8 | |
| 1975 - 1980 | Chevrolet | C10 | 454/7.4 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 | |
| 1975 - 1985 | Chevrolet | C20 | 454/7.4 V8 | |
| 1975 - 1985 | Chevrolet | C30 | 454/7.4 V8 | |
| 1970 - 1976 | Chevrolet | Caprice | 454/7.4 V8 | |
| 1970 - 1975 | Chevrolet | El Camino | 454/7.4 V8 | |
| 1976 | Chevrolet | G20 | 454/7.4 V8 | |
| 1975 - 1976 | Chevrolet | G30 | 454/7.4 V8 | |
| 1970 - 1976 | Chevrolet | Impala | 454/7.4 V8 | |
| 1976 - 1980 | Chevrolet | K10 | 454/7.4 V8 | |
| 1976 - 1978 | Chevrolet | K20 | 454/7.4 V8 | |
| 1973 - 1985 | Chevrolet | K20 Suburban | 454/7.4 V8 | |
| 1977 - 1985 | Chevrolet | K30 | 454/7.4 V8 | |
| 1973 - 1975 | Chevrolet | Malibu | 454/7.4 V8 | |
| 1970 - 1975 | Chevrolet | Monte Carlo | 454/7.4 V8 | |
| 1976 - 1979 | Chevrolet | P20 | 454/7.4 V8 | |
| 1975 - 1985 | Chevrolet | P30 | 454/7.4 V8 | |
| 1975 - 1978 | GMC | C15 | 454/7.4 V8 | |
| 1979 - 1980 | GMC | C1500 | 454/7.4 V8 | |
| 1975 - 1978 | GMC | C15 Suburban | 454/7.4 V8 | |
| 1979 - 1980 | GMC | C1500 Suburban | 454/7.4 V8 | |
| 1975 - 1978 | GMC | C25 | 454/7.4 V8 | |
| 1979 - 1985 | GMC | C2500 | 454/7.4 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 | |
| 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 | |
| 1965 - 1967 | Chevrolet | Malibu | 396/6.5 V8 | |
| 1970 - 1972 | Chevrolet | Monte Carlo | 402/6.6 V8 | |
| 1969 - 1970 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.2 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Great feel, amazing tech, and perfect fit
Size: Large, Color: Black/Gray (6 Pairs)
I've been purchasing the white w/grey toe socks for most of my adult life. Never really understood why I'd want anything else. Saw these as an Amazon suggestion one day and figured I'd give them a shot. Oh my freaking feet have never been happier!!!
I imagine that the fabrics used by UA to wick away sweat and odor are what makes these socks so comfortable, but I would be lying if I said I understood why they were so amazing. They slip on effortlessly and hug your foot throughout the day. Unlike the socks I used to purchase, these do not lose their shape after a full day of wear and exercise. They also have ample thickness to protect my feet while I'm running from any rubbing or hot spots from my shoes. I imagine this has a lot to do with the fact that they maintain their shape and do not move/slip around while wearing.
I was a bit hesitant to purchase black running socks at first, but they hide right below my shoe line and are even less noticeable than my old white w/grey toe socks I used to purchase. I am not certain what "charged cotton" means, but if it means amazing feel, great features (wick away sweat; fight odor), and all for a reasonable price. I'm in.
Overall, if you're looking for a nice pair of socks to wear throughout the day or while doing your workout, you would be remiss in not giving these UA socks a shot.
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Reviewed in the United States on April 1, 2017
★★★★★ 5
Comfortable socks
Breathable and stretchy cotton socks. They are stretchy, thick and soft.
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Reviewed in the United States on February 7, 2026
★★★★★ 4
super socks
Cotton socks have proven to be a simple yet indispensable addition to my daily wear, offering a level of comfort that sets them apart from other materials. The soft, breathable nature of cotton fabric ensures a gentle and cozy embrace for my feet throughout the day. Whether I'm navigating a busy workday or enjoying a relaxing evening at home, these socks provide a pleasant cushioning effect, preventing any discomfort or irritation. Additionally, the moisture-wicking properties of cotton keep my feet dry and fresh, making them an ideal choice for all-day wear. The durability of cotton socks has also impressed me; they maintain their shape and softness even after numerous washes, showcasing the reliability and longevity of the material.
One of the key features that make cotton socks a wardrobe essential is their versatility. Suitable for various occasions, these socks effortlessly complement both casual and formal attire. The wide array of colors and patterns available allows for easy integration into any style, making them a go-to choice for different outfits. In terms of value for money, cotton socks offer a cost-effective solution without compromising on quality. Overall, my experience with cotton socks has been consistently positive, and I find myself reaching for them daily due to their unmatched comfort, durability, and adaptability to various fashion choices.
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Reviewed in the United States on February 19, 2024
★★★★★ 5
Comfortable Socks, color variety not as implied
Size: Medium, Color: True Gray Heather Assorted (6 Pairs)
Pros: Comfortable socks, with wide, not tight band at the ankle. Wish I'd bought them sooner.
Con: Amazon description shows a photo of 6 pairs of socks, 2 black, 2 gray, and 2 white. The pack actually comes with 2 black, 1 white, and 3 pairs of gray.
Haven't washed them yet. Will see how they stand up.
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Reviewed in the United States on June 14, 2024
★★★★★ 5
Not polyester! Thank you UA!
I never realized shopping for cotton socks in 2024 would be so difficult. Luckily I found these, and all the other Under Armour cotton socks and they are the best.
I cannot wear polyester, and these only have like 1%. I didn't realize our cotton is being replaced by polyester, and I don't like it. Bath towels don't work anymore either...
I need my cotton socks and towels, I love incandescent light bulbs, I'll always have a gas powered mower and leaf blower. Also butterfinger should've never their recipe. Just sayin...
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Reviewed in the United States on May 4, 2024