I have an Interstate MT7 AGM/deep cycle battery and feel that the factory alternator can not keep up with charging it as it still drains every few months. I am also running dual viair air compressors and an aftermarket Alpine amp and subwoofer. Does anyone have experience with high output (175-250 amp) alternators on their LS430? Any recommendations?

Have you checked your current alternator to make sure its working properly?

Deep cycle/AGM in a car? Is that the correct application? Or is it just for the air compressors/shocks?

What are the correct applications? Audio systems with subwoofers and amplifiers, maybe?!