Has anyone increased the exhaust pipe diameter

mazdamp3_18

Member
:
06 gti, 06 evo IX
I wanted to know if anyone has increased the diameter of the exhaust and kept the racing beat exhaust. I am planning on doing this and i want to know about the sound change and the effectiveness of this mod and if it is even worth it. Should i have the 2nd cat and the resonator removed or just the resonator or neither?
thanks for any help...

Chris
Vivid Yellow MP3
 
Back