OK, you're replacing a timing chain, not belt.
I guess that is my fault, when some one says belt, I picture a front wheel drive sh!t box or whatever. (Like the tiiming belt I just did last night on the wife's Contour)
The timing gears are nice and acurate, but even the quiet ones make a bunch of noise. The noise seems 'cool' at first, but if it is a daily driver, they well become very irritating in a short time.
A quality double roller will stay tight for a good 50,000, and remain serviciable for another 30,000-40,000. So in reality, the durability or extended life is not much of a selling point.
Onless it is a race only, or more time on the strip than on the street, then the only main reason to do this is for the noise.
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