M5lp 1989 Mustang GT Leave It To Clevor Drag Test
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Autolite's 3923 cold plugs are gapped at 0.028 for our nitrous passes. After the first lap on the sauce, we noticed that while each plug has the light-brown coloring that indicates a good air/fuel burn, there also was a slight hint of speckling on the porcelain. Removing another 2 degrees of timing remedied this. View Related Article
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