I was wondering if i got high flow cats and take off all four cats where do the high flows go do they replace the front cats or the rear cats?

 

well from my experience. if you get 2 high flows you replace all 4.

basically your replacing the front 2 cause the rear ones are gay and unnecessary like red light cameras.

i mean if your going for loud. just cut off rear cats.

 

The essentially replace the rears since they are shaped like the rears, but your supposed to replace all 4 with them located where your rear cats were.