Hey everyone, just recently got me a 2001 GS-R and i love it so i decided to sign up to the forums, i used to have a 03 civic ex, it was nice but nothing compared to the GS-R.

I have a question to start out with. The car came with a loud ricey exhaust, i think its a greddy evo 2 and im wanting to exchange the axle back with something quite, maybe ITR or mugen, but i need to know some diameters, i need to know diameters of stock GS-R, and the ITR exhaust systems, can anyone help me out pls. Also, im not looking to lose power, if anything i wouldnt mind an upgrade.