Hi Tenille,

The Gilmer belt pulley system will be fine if used correctly. These smaller 1" to 1 1/2" belt versions are NOT designed to make noise although can be forced to do so.
This is by overtightening and this is when they fail. The aluminum wares away due to friction. Gilmer pulley systems should NOT be confused with gear drives. If you want the noise, you should add straight cut timing gears.
If you want the billet pulleys because of look and to work as intended, don't expect noise and do not overtighten or they will eventually fail.

Brand also matters!

Regards, Smooth