Review on Gates 38411 Belt Tensioner by Carlos Block

I drive a 2007 FJ Cruiser. I have a mileage of 122,000 km, it whistled and rattled under the hood. I had yet to change the serpentine belt (I had a trip ahead of me and I had no idea how long the previous owner had the current one). When I took the belt off I checked the old tensioner and drive pulley and they were very gritty. I replaced the tensioner with this one. No more noise under the hood.