In the near future I'm going to be buying a SCT chip for my 02 3.8 Mustang. Before I do that tho, I'm looking for some bolt-ons to add. Currently I have catback exhaust and CAI, but that's it. I've looked into Throttle Body, Throttle Body Spacers, Voltage Stabalizer & Ground Wire Kit, and Spark Plugs and Wires. I don't want to do underdrive pulleys because of my sub. If any of you guys can tell me anything about those options or maybe some other options let me know! Thanks.