I just put the Borla on mine. It feels like it may have lost some low end power, but feels a little faster in the mid to high end. Or then again it could just be the power of suggestion. But the Borla system is 20lbs lighter than stock, so that should help too.
“For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.”
- John 3:16