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Message: [QUOTE="mikeeg02, post: 1389901, member: 24194"] The stock ones will make ~60-75 Amps at idle. Usually 110-130 amps running. You could get a smaller pulley. And I actually have some leftover from another project you could try first. That 600w amp is probably fused at 40 amps. So on hits it shouldn't much exceed that. A pair of 100watt bulbs draw ~8-9 amps each. Hid projectors are usually 35 or 55 watts. Realistically, a smaller pulley on a stock alternator would do what you want. If you got a good stock replacement. But if you want more, just make sure you specify it's a diesel application, and that you want to know how much current it produces at idle. I'll look up tomorrow where I've bought aftermarket ones before. But stock ones usually last longest. When properly rebuilt. [/QUOTE]

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