You can get Hondata S100 for about the same price, or less. If you're OBD-II and you don't want to deal with the added cost of converting to OBD-I to run Hondata or you don't necessarily need all the tuning capabilities that i offers, then a piggyback unit is a decent option. Of course, you could go with something like the AEM EMS that works with OBD-II, but that'll cost you a bit more than an AFC. Whatever you choose, you'll need some dyno time to realize maximum gains.