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I have a 04 cobra w/ a 2.8, bbk cai, diablo tuner, bassani exhaust, w/ catted x pipe, accufab t/b and plenum, and granatelli coils, Can i gain HP if i swap to a colder set of plugs if so how much colder should i go and what plugs should i use. Also does anybody know if this will be a problem w/ the granatelli coils? And any feedback on the granatelli coils would be great.
 

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I have NGK's now myself. The Denso plugs are pretty good also.
 
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