No I don't, there is no need to run a 3" exhaust on this 1.6 motor , a 2.5 " exhaust will support over 500 hp which most never come close too. 3" will add droning if you like that, lol. Back in the 90's I put down nearly 400 to the wheels on my gsx eclipse with a 2" exhaust. Everyone has 3" fever in the tuning community, many evos reach 900-1000 hp with a 3" just to show how overkill it can be on a lower hp application, thanks.