harrison_r33

I recently bought my first skyline r33 gtst, it has a cat back full titanium one piece cannon. the rest is stock I’m fairly sure and I wanted to gut the cat to shoot hella mad flamez but no I know it is very illegal and I want to swap to a high flowing one. I’m not sure what to get. Preferably want a bolt on cat but just wanted to see if anyone is running anything worthy Thanks