Subscribe to a magazine

Bosch Platinum Plug

Back to article View Gallery
9 of 12
This is the business end of a Platinum+4 spark plug. As you can see, it sports four electrodes to provide optimum access to the air/fuel mixture. Bosch says this results in the most efficient combustion, and it also contributes to a longer performance life. The electrode gap is factory set, so you just screw 'em in.

Advertisement