✅ NEW OEM Harley-Davidson SHOVELHEAD 1200 / 1340 Spark Plug

Fits 1975–1984 Big Twin Shovelhead Engines

⬜ Harley-Davidson Part #32312-78A | Brand New in Original Harley-Davidson Package ⬜

Product Highlights

• ✅ Genuine OEM Harley-Davidson spark plug — not aftermarket or reproduction
• ✅ Part Number: 32312-78A (factory-correct replacement)
• ✅ Designed for 1975–1984 Shovelhead 1200cc & 1340cc big twin engines
• ✅ Proper OEM fit, heat range, and reliability for stock ignition systems
• ✅ Perfect for restoration, tune-ups, and factory-correct service
• ✅ Condition: Brand new in Original Harley-Davidson packaging

⬜ Compatibility (General Guide)

• ✔ 1975–1984 Shovelhead Big Twin models (1200/1340)
• ✔ Common families include FL / FLH and FX variants of the era

Always confirm with your service manual/VIN and part number 32312-78A to ensure exact fit for your year and ignition setup.

Installation Notes

Installs like your original:

• Gap to factory specification per your service manual
• Apply a light touch of anti-seize on threads if specified
• Torque to spec; avoid over-tightening in aluminum heads
• For best results, service both plugs (where applicable) during tune-up

What You’ll Receive

• (1) Genuine Harley-Davidson Spark Plug (#32312-78A)
• Brand new in Original Harley-Davidson Package

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Harley-Davidson Shovelhead spark plug, OEM Harley 32312-78A, 1975–1984 Harley spark plug, FL FLH FX Shovelhead tune-up, 1200 1340 Shovelhead ignition, Genuine Harley spark plug OEM

✅ Give your Shovelhead the factory-correct spark and reliability — choose Genuine OEM 32312-78A and order with confidence!