Ok, they're quite inexpensive, however, I'm just wondering if they be any good on a V6 Camry? Any input appreciated, thanks. UPDATE: I've read the following from Toyota Nation: There was one guy who did a full test on audio cap with a scrope monitoring voltage drop with and without a cap. Result is bad. The cap did smooth out the curve a bit but never was able to do anything useful when bass hit. A cap will remove high freq noise in electrical system. They'll never remove low freq noise produce by bass. Reason is the bass took so much current the cap can't hold that much. A voltage stabilizer or regulater is an active component which will step up voltage when supply voltage drops. Sounds good. Problem is battery voltage drop due to bass hit with high current draw and system can't supply such high current. In order to step up voltage, the regulater need to draw more current from the system, Power = Current x Voltage, to keep Power constant with lower voltage current gotta increase. Now our voltage problem was because of not enough current and we're trying to draw more current to fix it Don't think that'll work. A voltage regulator works great only when system voltage is greater then needed. Say 24V source for 12V component. A regulater will be happy supplying 12V all the time. On a 12V-12V system, the regulater need to draw more current to keep output constant.