Thread: Recommend Spark Plugs
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Old 05-12-2022, 06:15 PM
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twobjshelbys twobjshelbys is offline
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Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
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Whatever Roush recommends. The Cobra part is irrelevant. The 427IR is a bored/stroked Windsor with a 10 (10.5?):1 compression.
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