HOLLEY EFI GEN III HEMI SMART COILS
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HOLLEY 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 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
Shipping
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Out of stock items are shipped as soon as they're available. Many items are built to order. Those items will have an average lead time on the product page.
All items on our website ship for free. However, a restocking fee equal to the shipping charges incurred by us, the seller will apply to all new condition items returned due to a customer changing their mind.
High value items will require a signature on delivery for your purchase protection. We will only ship to the verified billing address provided with the order.
Returns
Returns
What items are returnable?(eligible for returns)
- 30-day return policy, which means you have 30 days after receiving your item to request a return.
- In unused and resellable items, or defective items.
- In the original packaging with all the tags intact.
What items and exceptions are non-refundable?
- Digital Items like Tuning Credits for HP Tuners
- Gift cards.
- Discounted items (if applicable).
Damage, loss, or theft issues
- If the purchased product is faulty, reach out to us within 7 days of the delivered date.
- If the purchased product is loss, or theft, Please collect evidence and contact us immediately.
Refund solutions
- Refund to original payment method.
- Refund to your shopify store credit.
Refund policy
The Tuner Store accepts returns on new products within 30 days from the date of delivery. Items must be received in their original packaging material and in a new status. Used products or customer damaged products will not be accepted.
The Tuner Store reserves the right to apply a restocking fee to all returns. The purpose of this fee is to recover operational costs related to the purchase and the customer changing their mind.
When returns are the result of the manufacturer defect as determined by The Tuner Store, the return will not be subject to the above restocking fee.
How soon will I get my refund?
- After your return has been processed, you will receive a refund notice from us and it will take an additional 1-3 business days for the refund to be returned to your original payment method. The refund to the store credit is immediate.
- If more than 5 business days have passed since we’ve approved your return, please contact us at service@tunerstore.com.
Got a question?
Shipping Notice
Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.

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