Holley 558-3321 Factory Replacement Ignition Coil Harness for GM LS Engines w/OEM Ignition Coils
510-558-321
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Ignition Harness
Holley 558-3321 Factory Replacement Ignition Coil Harness Features:
- OEM connectors
- Techflex F6 braided wire looms
- Replace damaged factory harnesses
- Works with Holley EFI main harnesses with coil on plug connectors
- Completely plug and play
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
FAQ
Are LS coil packs interchangeable?
- Yes, within the same generation of LS engines.
- Ensure compatibility with plug style & wiring.
- The Holley LS coil harness (558-321) facilitates seamless swaps.
Are OEM coil packs better than aftermarket?
- Depends on specific requirements.
- OEM offers reliability; aftermarket may enhance performance.
- Consider factors like budget and desired outcomes.
Do you need a tune for upgraded coil packs?
- Not necessarily, unless other major modifications.
- Tune may optimize performance but isn't mandatory.
- Holley coil harness (558-321) helps integrate upgrades.
Do upgraded coil packs increase horsepower?
- Minimal direct HP gain; improve ignition consistency.
- Enhanced spark may support power delivery.
- Consider a comprehensive setup with Holley 558-321.
Understanding the role of coil packs and harnesses like Holley LS coil harness (558-321) aids in optimizing LS engine performance without compromising compatibility.
Specifications:
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.