Ok, I know iIve made a post about this before but I never really got much of an answer... What does anyone know about high-flow cats that they could share with me? Do they give you a better sound? If so what brand would you recomend? And I guess the final question do you think it's worth it to get them even if it's just for the sound? Thanks alot guys!!

 

The MAC Hi-Flo's are really nice. Do you live in a state with emmissions testing?

 

cats are already as efficient as they can be, aftermarket highflow cats dont make any great improvment , IMO they are not worth the money, i dont even think you would see a gain on the dyno

youll get no sound improvment, it will sound jsut the same

 

You are right, however if he lives somewhere without emissions then he can just remove both cats and go straight 2.5" piping