Quote Originally Posted by kidstyle12
i think the gsr is best 4 boostcuz it comes comes with beefier internals than a ls. jus change the pistons for a high boost 2 lower compression correct me if im wrong
If you're gonna go that far in and replace pistons, who really cares about the rest of the internals that are stock?

"better" completely depends on what you want to do, where you want your power, what you can afford etc. This is like asking "what should I eat for breakfast?"