i have a 3" all the way until it hits the mufler and turns into 5" through it and a tip
if you get headaches u dont want to be in my car,
but sounds mean though!!!
you get used to it after a while.
(after 20% hearling loss) jk
yesterday
spotted
gunmetal r32 gtst 4 door on M2 round lunch
had gtr bonnet and wheels
almost 100% its the dude on this forum with the gtr plenum on the rb20.
my gf was driving, she was in as a hurry if you noticed