sykkall

Hello, I was wondering if there are any less expensive aftermarket amps for the LS430 or if I should just stick with getting the OEM one.

DrVlikhell

There is no aftermarket direct replacement amp for the LS430. All aftermarket amps out there would require significant customizing of the cars audio system for them to work. There are a couple places around the country that will rebuild your OEM amp. I forget the names of the places but there are threads about it here on the forum if you want to go that route.