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anybody use the bosch +4 spark plugs?

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Old 10-26-2003, 07:29 PM
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Car: Black 89 Formula
Engine: ??????????
Transmission: ??????????
anybody use the bosch +4 spark plugs?

Has anybody used the bosch +4 spark plusg if so any performnace gain or not.
Old 10-26-2003, 08:14 PM
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I used a plat. plug from them and I didn't seem to notice any difference.
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