Where can i find a H.O alternator for my accord? Do the 4th gens fit? Should i invest in a custom wound alt. or just put a second battery in the trunk? This is all for my stereo system if anyone is wondering

 

Not sure how much more you are look for or needing so hard to answer.

The LXi's have a slightly higher amp rating but there will be some wire changes needed - DX/LX have a three pin plug/LXi's have a four pin plug. Pretty sure the newer (4th gen and up) will not fit

 

I currently have the stock 60 amp alternator. Im hoping to find a 90 amp at least for my stereo system so it can keep up lol

 

you could reach out to some alt builders and send them a stock alt for a re-wind. that would probably be the easiest to implement. Quality Power alts can do this for you, most likely.