I need a good recommendation for a good serpentine belt if I'll be making a decent amount of power with an LQ4.

 

Gatorback has done me well.

 

What do you call a decent amount of power? It seems some people run into a problem of the OE harmonic balancer spinning on the front of the crank before they move to a 8 rib setup or special belts. Like said above, the gatorback or any similar quality belt should fo you just fine. Btw, belts cans get hard and glaze over time which can cause slipping.