i think you could get a custom 3" exhaust installed for around $200 but that wouldnt be including a muffler or resonator......but depending on the muffler and resonator you could probably get it all installed for close to $300 maybe a little more.....the only thing is once you boost id go with mandrel bent piping and NO exhaust shop will do a mandrel bent exhaust for that...those mandrel bending machines are expensive and most exhuast shops dont have them.....but i suggest thermal research's 3" exhaust...its around $550 and suppose to sound really good