I was looking into purchasing a fuel modifier and I was wondering if any of you guy's can give me some advice on what to get, and how much psi should I set it at. I have a 1999 gs with greddy headers, airmass catback exhaust, aem cool air intake, nology plug wires, nology pluges, and a performance chip. Any help would be much appreciated.

Thanks

With those mods, it heardly seems that you require a fuel modifier unless it's capable of leaning you out slightly. But if I remember what those fuel modifiers are, they are designed to increase your fuel output. For some reason, many people are under the mis-impression that more fuel, by itself, means more power. However, that is entirely incorrect. Unless you have more O2 and spark to react with the fuel, and I mean a LOT more, you need not add anymore.