Thread: Spark plugs are hitting the pistons. Help!
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Old 09-15-2018, 07:11 AM
Goopie 18 Goopie 18 is offline
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Join Date: Jul 2005
Location: Punta Gorda, Fl
Cobra Make, Engine: SPF 2473, Roush 427R
Posts: 203
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Bill, I overtightened the plugs on my Roush 427R and flattened one plug. I'm guessing that happened to you. I like the looks of your new plugs. What is the part #?
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