Ls VS Ls competition Catalytic converter: Any Difference?
 

Hello everyone!
My Monte may need a new catalytic converter, and i have my eyes on an inexpensive direct fit, but it only lists compatibility with the ls competition/ls sport/SS. Is there any difference? If so do you guys have a relatively affordable Catalytic converter that is better than OEM and hopefully cheap? I live in NH so i only need a 49 state legal one. Thank you all for your help