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TR55's???

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Old 12-31-2006, 06:12 PM
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Default TR55's???

Hey my buddy has one of those silverados with the 5.3 in it eithier a 99' or 00'. Would the NGK TR55's be the best spark plug for it like the LS1's?
Old 01-01-2007, 05:38 PM
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Its a stock type replacement, with a copper instead of plat




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