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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4
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Description
Holley Sniper EFI Hyperspark 2 Ignition Box # HO556-154Holley Sniper EFI Hyperspark 2 Ignition Box # HO556 154 Features: Direct replacement from previous model, can use the same harness and connector with new or existing HyperSpark installs Greater spark energy of 135mJ to 150mJ from idle to redline RPM (Based on components used) Powerful capacitive discharge of multiple sparks improves throttle response and engine combustion Updated processor and board for improved efficiency reducing heat and current
Holley Sniper EFI Hyperspark 2 Ignition Box # HO556-154
Features:
- Direct replacement from previous model, can use the same harness and connector with new or existing HyperSpark installs
- Greater spark energy of 135mJ to 150mJ from idle to redline RPM (Based on components used)
- Powerful capacitive discharge of multiple sparks improves throttle response and engine combustion
- Updated processor and board for improved efficiency reducing heat and current draw
- Filtered circuits preventing magnetic interference
- Built in protection against open coil, shorted coil, and open load scenarios
- Smaller size and weight for more mounting options
- Operates on many 7V-28V electrical systems
- 12 pin connector
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 14 reviews
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Product Reviews
★★★★★ 4
The fit is pretty good, it's acceptable.
Color: Navy Blue, Size: X-Large
Very good fit. The sleeves are long enough, I guess. I'll be rolling them up anyway. I would like it to be a tad bit longer though for tucking in. Other than that it feels nice and lightweight, can't wait to wash it so I can use it for going out.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
The product is good.
Color: Grey, Size: Medium
Good for all weather, don’t need to iron, I use it for all occasions specially for work, is good material, good quality, price is right, I like the color.
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Great for the Money
Color: Blue, Size: X-Large
Nice cut. Properly sized. Great product for the money.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
I like it!
Color: Khaki, Size: Large
Worth the price. Comfortable. Great assortment of colors.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Sweet
Color: Navy Blue, Size: Large
Good fit, solid quality.
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Reviewed in the United States on May 11, 2026
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