Accel 14mm U-Groove Platinum Spark Plug Set for Harley-Davidson

HD 5R6 application.
14mm long reach thread.
Used with 21mm spark plug socket.
Equipped with a U-groove platinum tip.
Platinum spark plugs are more durable, have a wider heat range, and will operate at lower voltage.
By maintaining a precise gap for a longer period, it will provide a longer life than regular spark plugs.
Custom replacement for OEM accessory platinum spark plug set 32328-97.

Compatible with: > L78-82 FL; L78-79 FX; 84-99 Evo BT (excluding Twin Cam)