how much power can the factory timing and balancing belts take b4 having to switch to stronger ones like GReddy?

 

With the Power Enterprises (pioneer of strong belts) and Greddy belts, they will resist any kind strecthing, breaking, and last 2X+ longer than your average OEM belt. It is definitely worth the piece of mind if you are changing your belts anyway and/or plan on making big power that the factory belts were never originally designed for.
We carry the Power Enterprises Timing Belt, Balance Shaft Belt, and Accessory Belt.
Hope this helps.