Going with a ets kit on my 1g also so this is for sale. Big 3.5 inch thick core and 2.5 inch piping. Piping isn't the prettiest but it gets the job done, and it came off of a 1g that made 513whp. ASKING 260 obo which is what I payed for it. TEXT ME FOR FASTEST RESPONSE. 404-353-8869.