Whats the difference between piggy back style pulleys and non piggy back? and why do piggy back pulleys not give u any hp.??

 

any 1??

 

Piggyback pulleys are aluminum and the crank pulley is mated with the stock balancer and the whole shebang is bolted back in. They are a pain to mate and almost impossible to separate if you wanted to. I had piggies and mine had a slight vibration between 2500 and 2800 rpm, which caused the CEL to light. I replaced them with Steeda pulleys and no more CEL.

Theoretically, they both produce the same power advantages.