As an automotive enthusiast I wanted to upgrade my car belts with premium options.Through trial and error, I found that this pulley didn't live up to its hype. The installation was a nightmare, and the tensioner didn`t seem to function correctly. The result? My car sounds like it's about to rattle to bits every time I hit a bump in the road. The only pro is that it's marginally less expensive than some of the other products on the market. Save yourself the headache - don't bother with this inferior tensioner..