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Re: NGK TR6 spark plug question "which one"
hahahaha When i went to my local oreily"s to pick up a set of plugs, i asked what one step colder plug than factory was, he asked his manager then told me that the cheaper the plug the colder, the more expensive the plug, the hotter! 
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2003 Mach 1 Torch Red, 4.6 WAP block .20 coated manley pistons, manley h-beams, 98 cobra cam, BTR springs, Fererra valves, BC auto 4r75w w Freddie Brown MVB w brake, CircleD 4c, built rear and baseline drag suspension. NOS wet kit w NANO.
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