O/r x pipe question

[BruhBrahBrad]

Why is it that an off road pipe is louder than, a gutted stock h pipe? I mean, damn theres still no cats. Does it have to do with the type of metal the pipe is made of?

 

[CC'S95GT]

stock pipe is 2.25, aftermarket is 2.5
With the cats gutted the shell acts like a resonator.

 

[pp_puncher]

the x will also flow more cfm

 

[BruhBrahBrad]

stock pipe is 2.25, aftermarket is 2.5
With the cats gutted the shell acts like a resonator.

Ahhh now that makes sense..