Most people run autolight #24's for a NA car, and I believe you need colder plug for you application. I think maybe #23's or even #22's but those might be too cold for street use. I guess you'll have to wait and see what the SC guys are using.
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NewEngland Auto www.baystategearheads.com
-91 Mustang Coupe, ex 4cyl (sold)
-99 F150, 3" lift, 35" Procomps, Magnaflow exhaust
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