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Registered
Join Date: Apr 2000
Location: Seattle, WA, USA
Posts: 76
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I use the factory recommended silver tipped Bosch plugs in my 931.
I use to use platinum's in the carbed 914, but they are a no-no in Turbo's.
I'll never use NGK's since my buddy's bus got stripped holes from them--and they had anti-seize on them! Made me wary....
too each his own on this one, like oil and filter and gas choices.....
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