I used to run the old non-platinum Rapidfires in my old supercharged 93 Pace Car and they were a great plug. They changed to platinum a while ago and I've never used them since. Why they keep thinking they're making things better when they aren't is beyond me. They want bling to sell to the kids I guess.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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