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hey just wondering if voltage stabalizers are worth buying or if you can tell the difference??

 
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i have the NRG E-PAC or something like that. the homies bought it for me for my birthday. it really depends on your setup. if your putting it on a stock civic (no ice/audio) or anything it really has no effect. if you got a small amp/sub combo it helps a little. not a significant difference. it just made my lights dim less hence a more consistent voltage. it shows up more steady on my volt gauge.

 
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upgrading your 3 ground wires and adding a bigger alternator would be better money spent. the stock alternator puts out 840w. your car uses up 200-400w of that minimum, depending on what you have running. caps and stabilizers are just bandaids.

 
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i have HVS-GT, it prolly does something, the best feature is the battery life light