E46Fanatics - View Single Post - ZHP exhaust on a 323iT, cat-back?

TiAgTouring · 08-10-2009, 01:43 PM

From what Ive read,

323/328 is twin 2.25 inch pipes til 1st resonator, then single 2.5 inch pipe the rest of the way

325/330/ZHP is twin 1.5 inch pipes from cats all the way back. Everything I've read says this is soo much better than single 2.5 inch pipe, and is a much better design

You are right that Im not going to be getting amazing gains or a huge change in tone/ volume, but I just want a little bit (can't be too loud b/c of where I live). I am also looking for a cost-effective solution, and don't want to spend much over $300 for parts AND labor.

Ideas or thoughts? Thanks

08-10-2009, 01:43 PM	#5
TiAgTouring Registered User Join Date: Jul 2007 Location: Athens OH Posts: 1,575 My Ride: has a D-Pillar View My Garage	From what Ive read, 323/328 is twin 2.25 inch pipes til 1st resonator, then single 2.5 inch pipe the rest of the way 325/330/ZHP is twin 1.5 inch pipes from cats all the way back. Everything I've read says this is soo much better than single 2.5 inch pipe, and is a much better design You are right that Im not going to be getting amazing gains or a huge change in tone/ volume, but I just want a little bit (can't be too loud b/c of where I live). I am also looking for a cost-effective solution, and don't want to spend much over $300 for parts AND labor. Ideas or thoughts? Thanks __________________ 323iT 5MT ZSP/ M54B30 Manifold Swap/ F1 Headers + Full ZHP Exhaust/ UUC SSK + DSSR/ CF ACS Mirrors/ M3 Steering Wheel + ZHP Shift Knob