Leading and Trailing
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SOLD THE RX-7!
Join Date: Mar 2001
Location: Vancouver, BC, Canada
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the only diff is one number in the plug serial number. and they should also have an "L" and "T" written on the plugs.
the heat ranges are slightly different.
if you swap them the car will still run.
leading are the lower ones
the heat ranges are slightly different.
if you swap them the car will still run.
leading are the lower ones
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