B pipe i mean the pipe after the catalytic converter till the muffler , the middle pipe basicly and the resonator are from a d16 esi del sol
The muffler from a ej9

Hello does anyone know the diameter of the b pipe from a del sol esi d16z6? In my d14a4 the previous owner installed a ek4 catalytic converter, del sol b pipe and ej9 muffler (i installed 4 2 1 headers a few days ago) I dont know if its better or worse than stock ,but i think that when the car reach...