bbk underdrives

sneaky98gt said:

The BBKs are piggyback, and the piggybacks are what cause most of the problems. Most people (myself included) will say to stay away from them.

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+1

If you really feel the urge to get U/D pulleys, get a set with an SFI approved balancer. They cost more, but they are a much safer design than the piggybacks.

I wouldn't bother though. Some people get 4-5rwhp, some gain zero. To me, I don't want to risk throwing the balance of the engine off for a few hp.

the only underdrives I would use is the steeda ones. They are one piece and I have them on my car