Most of the power you pick up on underdrive pullies comes from the crank pulley. The problem with some aftermarket pulley sets, especially on Honda engines is that the new crank pulley doesn't use the ever important torsional vibration dampener. So make sure you get a set that does not require the stock dampener to be removed and you shouldn't have any problems. Another thing to consider is how the pullies achieve the added power. Underdrive pullies gain power in two ways. They are either a smaller diameter, which sucks, because your accessories like ps, and your alternator don't work as well. The second way is by weight savings. The lighter they are the easier they are to spin and they create less parasitic drag on the engine. I've had experience with both types and I would say if you can find a set that keeps the same pulley diameters as stock, but are much lighther, then that is the way to go. you'll pick up some power and everything will work the same. Unorthodox Racing makes lightweight pullies that work well and maintain stock diameters, so your lights won't dim and your battery will get a full charge from the alternator etc. Sorry for the novel