alternator belt replacement

[mainesail]

There are two versions of the Top Cog.

Top Cog Gold Level - Grooves on top only help aid flexibility and cooling

Top-Cog Gold Level - Groves on top & cogs on bottom aid in flexibility and cooling

I have had the best luck with the Gold Top & bottom cogs.

The Gates NAPA belts are good too but I find the Top Cog to be about the best and longest lasting... I just replaced one last week that had been in service for 811 hours driving a 72A alt........

[KWKloeber]

There are two versions of the Top Cog.

Top Cog Gold Level - Grooves on top only help aid flexibility and cooling

Top-Cog Gold Level - Groves on top & cogs on bottom aid in flexibility and cooling

Not to be confused with the Dayco "Gold Label" with only bottom cogs.  You need a score card!
The parts finder link I gave will show you which "Gold Label" belt it is when you click on the p/n - bottom cog, top cog, both cog.

Ken