2.25", comes out off the header at 3" into the catalytic converter then its 2.25" from the cat all the way back through the first resonator and then into the muffler and out to the flared out tip.yogi
MagnaFlow ExhaustAEM CAI Windows Tinted 35% up front 20% rest17" Quantum Tek S-16 wheels w/ Dayton Daytona ZR performance rubber.Wish list:Eibach Lowering SpringsHotchkiss Sway BarsStrut Tower BarJL Audio Vibe GT Systembest time: 15.564@90.64dyno run : 162.1 wheel hptranslates to approx: 192 flywheel hp