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For Your Every Summer RSVP, with Code: SUMMER15
Description
Holley EFI Gen III HEMI Smart CoilsHOLLEY EFI GEN III HEMI SMART COILS Black, Single Coil Overview These Holley EFI Smart Coils are a bolt in ignition upgrade for your late model HEMI or Coyote engine. Here's the difference over a stock coil; they produce more spark energy while consuming less power without sacrificing voltage output. This means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder while using less power from your electrical system. For
HOLLEY EFI GEN III HEMI SMART COILSBlack, Single Coil
Overview
These Holley EFI Smart Coils are a bolt-in ignition upgrade for your late model HEMI or Coyote engine. Here's the difference over a stock coil; they produce more spark energy while consuming less power without sacrificing voltage output. This means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder while using less power from your electrical system. For Hemi combinations currently using Holley EFI or Terminator X, use Smart Coil Ignition Harnesses 558-312 Coil Extension Harnesses 558-326 for a plug and play solution.
Features:
- Direct bolt-on to factory valve covers
- Same wiring pinout as other IGN-1A coils for easy plugin upgrades (Will not work with factory wiring)
- More spark energy than any other smart coil on the market for maximum fuel burn during combustion sequence
- Low current draw means less demand on the electrical and charging system
- Built-in ignitor for compatibility with Holley EFI and many other aftermarket ECU??????s
- Maximum operating voltage of 18 volts ???? for compatibility with both 12 volt and 16 volt electrical systems found in many performance/race applications
Details:
- Color: Black
Links
Instruction Sheet
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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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
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Product Reviews
★★★★★ 3
Good tape, not very sticky
This worked well. I used this to water proof a camper shell. I had to manually hold it in place because it wasn’t sticky while applying between sheet metal seams.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Great way to cushion grips
I used it to cushion the grips on some dumbells. Works great!
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Reviewed in the United States on February 17, 2026
★★★★★ 4
No adhesive work great for me
We used this on a cord on a medical device. That required no adhesive. It can be removed as needed with no adhesive left behind.
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Reviewed in the United States on January 21, 2026
★★★★★ 5
Best heat tape I've found
Size: 20mm X 33m
This is the only tape I purchase for my sublimation crafts, mainly because it just functionally works. The tape is durable and adheres well to the substrate. This tape doesn't leave a residue like other heat tape I've purchased. Easy to use, as the tape dispenser I have for crafting cuts the tape automatically for you when you advance the tape from the dispenser. My dispenser holds 2 rolls at a time, and since I get 4 rolls with my purchase, it is economical.
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Reviewed in the United States on September 17, 2025
★★★★★ 5
Great heat resistant tape
Size: 20mm X 33m
Good brand. Has great sticky power. Heat resistant and will not leave residue like some of those yellow tapes
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Reviewed in the United States on May 27, 2026