so far im thinking 3 inch from the turbo back, high flow cat, small resinator in the middle and a muffler at the back. Been told that will produce some noise with the resinator suppose to take out the supposed drone effect. Got told they can also add the drone so i aint know what to do at this stage but i dont want it to damn loud, would love to have it bulk loud but dont want to be hassled by the cops everytime they pass me