Forum Discussion
mtrumpet
Oct 29, 2012Explorer
Can only report on my own experience. Now, on my third set of 670's. First set was on my old gasser w/ 19.5 inch. Had them on for 4 years until we traded in and no problems. Bought the DP and they had them on (22.5 inch), but the date code indicated that they were 4 years old, but no problem. Ran them for another year then replaced with a new set of 670's all around. Haven't had any problem with this latest set which is about 2-1/2 years/approx 14,000 miles old now.
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