buying new exhaust system?
Not sure what ur state laws are but mainly its about the noise level and if ur cat filters properly. personally id go with a high flow catalytic convert with a good muffler tip. each state measures levels of sound of mufflers by db I think so check ur state laws. I'm sure you'll be fine. friend had header. CAI cams high comp pistons etc and he passed smog on cali cuz of his egr valve and catalytic converter. read Honda forums my dude they can tell u everything!
Have a muffler keep set up a popular glass %. They all inventory them and so much sound beautiful deep at idle however cool down a few beneath load. Trust me you do not wish loud in the event you use your truck to tow with. 500 miles of LOUD even as towing a trailer sucks after the primary 20 miles. Been there performed that!