Re: NGK TR6 spark plug question "which one"
Use the iridium plug. TR6ix
A lot of people(myself included) have found the copper TR6 will cause low speed bucking or a surge feeling. The iridium seems to burn better and drives a lot nicer.
You can run a slighly wider gap with iridiums also, but like people have said try that 0.032-0.034 gap.
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04 Cobra
3.4 Whipple, return fuel, ARH headers, etc.
11.6 @ 133.8mph, 2.05 60', 5200ft DA, 275/40/17 M/T radials.
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