Stock hobbit worn out would be fine.
The standard thing thats done is to add stronger contra springs to the pulley as you add hp.
You don't need to add a stronger spring with this ramp plate due to its shape, so stock spring or slightly weaker is fine, even with fucking race gears. That's amazing.
This plate shines with a kit, with pretty much no rpm drop. It's just a real piece of work.(edited)