I usually read information on the Internet, for example on portals about pick-ups there are many articles about Dodge pickups and parts for these cars. Here https://truckpowerup.com/best-exhaus...ram-1500-hemi/ , for example, are reviews of several exhaust systems. I like that in such articles there is a complete description of the part of the car and highlighted the pros and cons of each model. It helps to choose the best option for you. In addition, you choose exactly what fits your car. I also recently changed the exhaust system in my Toyota Civic, but Toyota's exhaust system doesn't fit the Dodge.