Thread: Spark plugs for older N351 heads
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Old 05-28-2012, 08:59 PM
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Cobra Make, Engine: Cutting Edge Replicas, 427 World block SBF, TWM Injection
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Default Spark plugs for older N351 heads
Have a set of older N351 heads on 347 SBF 2004 motor. I noticed the newer N351 heads use a spark plug with a 0.708" reach. My heads use 14mm 5/8" hex with 0.460" reach. Is this right????
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