OS SPEED edition of the P3 plug with 24k Gold coating. Developed as part of the 80th anniversary celebrations for OS 

Features:

• Easier to tune
• More low-to-middle range power
• Quicker throttle response
• Faster acceleration
• Better mileage
• Crisper idling, with a difference you can hear
• Increased longevity
• Speed P3 ideal for ultra-hot applications;

The OS P3 Plug is well suited to a wide vareity of engines, specifically those OS based .21s such as V Spec and Later VZ-B and XZ-B as well as B2101 and B2102.

Also used in the SPower S3 and S7 as well as the Bullit B216, 217, 218, 219 and later B220 and B221, Maxima B2R and B4.