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The platinum rapidfire isn't star shaped though. It's the same platinum tip as any other plug so there's nothing special about it. I had a Jacobs ignition box and supercharger on the LT1 so I didn't want to use platinum. NGK seems to be the only non platinum plug worth using.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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