OEM alternators are the best. The fact that your battery has more CCA then rated is weird and could help find the problem. Its hard to do but try to measure voltage when the lights shut out.
Corroded ground could also be the problem. The grounds are crap on the rsx especially one that goes to the trans it corrodes then its useless.
Corroded ground could also be the problem. The grounds are crap on the rsx especially one that goes to the trans it corrodes then its useless.