Accel, U-groove platinum spark plug set. 12mm Fits: > 99-17 Twin Cam; 86-21 XL Sportster

HD 6R12PP. 12mm threaded. Used with 18mm spark plug socket. Equipped with a U-groove platinum tip. Platinum plugs are more durable, have a wider heat range and will work with a lower voltage. By maintaining a precise gap over a longer period it will provide a longer life than regular spark plugs. Custom replacement for OEM 32362-04A (regular) and 32329-97 (platinum version).

Fits: > 99-17 Twin Cam; 86-21 XL (exclude XR1200)