Thread: 1 or 2 step colder plugs?
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Old 08-15-2013, 01:14 PM   #24 (permalink)
COSMO
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Join Date: Dec 2012
Location: FL
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Drives: 2012 Touring GTM TT
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I run these on my gtm Stage II TT set up (HKS 50003-M40HL)... Great Plugs and their not cheap. If your not FI just stick with the stock plugs...
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