I can’t find one where ever I look
Will changing the muffler make is sound betterHe means an exhaust system from the rear axle back to end of auto, here's an example:
Experience the sound and power of a performance exhaust system on your 2015 Kia Optima. We have complete systems, mufflers, headers, and more to make it happen.www.carid.com
Lots of money for not much, well except noise that only a teen ager would like....