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Holley EFI Pro-Billet Ignition Adapter 558-325

Holley EFI Pro-Billet Ignition Adapter 558-325
Holley EFI Pro-Billet Ignition Adapter 558-325Holley EFI Pro-Billet Ignition Adapter 558-325
$65.99 ea
NEWARRIVING SOONEstimated Ship Date 07/24/2025 (If Ordered Today)25 Available from HOLLEY PERFORMANCE PRODUCTS as of 07/06/2025
Model: 4952989
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Designed to plug and play with MSD Pro-Billet distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.
Features:
  • Allows for plug and play ignition timing control when utilizing an MSD Pro-Billet distributor.
About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!

Downloads:

Download Name File Size
efi_selection_chart62914.pdf836.71KB

Videos:

Specifications:

Emission Code 3
Harness Application Universal
Harness Type Ignition
Part Type Ignition Coil Adapter
Product Type Ignition Harnesses
Proposition 65 www.P65Warnings.ca.gov

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Holley EFI Pro-Billet Ignition Adapter 558-325: