[JX-guy]

Does anyone know what specific parts and from what manufacturer would be considered "approved mods" and wouldn't void any warranty from the dealership?

 

[V6_driver]

The safest way is to go to the dealership and ask. Since a lot of dealership offers their own aftermarket parts and as long at they're the ones to install it they should still honor the warranty.

 

[cfrp]

Depends on the dealership. Some dealers are lenient with modifications where as others will blame the fault on the modification.