Quote:
Originally Posted by BYprodriver
I realize that but Bosch recently discontinued their Iridium 4 electrode plug for 986s & I couldn't find a NGK replacement either. My local supplier said Bosch recalled the plugs off their shelf.
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I think you are referring to the Bosch "Platinum Ir Fusion" plug that is a hybrid of both Iridium and Platinum plug technologies. It uses Yttrium side electrodes and a Platinum and Iridium center electrode:
I had heard there had been problems with the side electrodes.
The Iridium's we use are single side electrode Denso's, and they have been working very well for us.