I don't understand people who install "underdrive" pulleys.. why risk messing up your motor for a few horsepower?

 

well before I added the light weight pulleys I did ALOT of research and I know the risks, if anything does happen my engine is still under warrenty. Also I notice that my acceleration is faster and much smoother, also my reving is faster as well. I am pleased with the pulleys I got and dont want to go back to stock again.

For sure I will monitor the pulleys and make sure everything is in working order. I open my hoold twice a week to check and make sure everything is ok.