Ima check the xs3000 out.they better? Was thinkn 4 batterys to.and the bracket I'm build for my car for alts is gonna take some time I have to modify alot of shit find different size pulleys and finding a belt to fit that's long enough or the right size is going to be hard.i looked at gates belts and the sites very confusing.wish they had options for different length size belts that is simple to look at I could order a large case 370 amp alt but id still need 2 more 240s