NGK-TR-55 or TR-6

whiteDemon

New Member
Feb 23, 2008
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I am trying to decide witch one to buy for my 2000 GT.
I have the basic bolt-ons T/B, elbow, cold-air, mass-air, 30lbs injectors, ported heads, mild cams, pulleys, full exhaust, forged short block with 9:4.1 compression. Staying N/A for now. Should I go a step colder or stay at stock heat range?

Any help will be appreciated.
Thanks. Gabriel
 
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