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Platinum Plug, 14mm Thread Size, 25mm (.984") Reach, 5/8" (16mm) Hex Size, Tapered Seat, Interference Suppression Resistor, Surface Air Gap Plug, 4 Ground Electrodes, Heat Fused Platinum Center Electrode, Solid Terminal Nut, Heat Range 8
Bosch Platinum+4 has the most platinum in the Bosch Platinum plug series. Platinum +4 unique firing technology combines the advantages of surface air gap technology and 4 yttrium enhanced ground electrodes. The fine wire platinum center electrode (which is heat fused into the extended ceramic insulator) reduces the voltage necessary to jump the gap as well as reduces quenching. The 4 ground electrode design not only provides multiple radial spark paths but also the surface air gap design creates optimal exposure of the air/fuel mixture to the enhanced ignition spark. The yttrium-enhancement of the ground electrodes even further extends plug life. All Bosch Platinum series spark plugs are designed to reach self cleaning temperature faster for quicker starts, smoother acceleration and increased fuel efficiency. |
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= ultimate class
= premium class
= super class
= regular class
