HKS Fine Tune Timing Belt 4G63 4G63T Eclipse GST GSX 6 Bolt DSM

When installing cams and/or camgears, its a good idea to replace your timing belt at the same time as your current timing belt will need to be removed anyways to install the parts. Timing belts do not last forever and old factory belts can become dry rotted or weakened. This could lead them to fail under load and completely ruin an engine. 

The timing belt is an inexpensive part in the big picture of building an engine. Replace it while everything is apart and forget worrying about it ever again.