EBay! Go to a website such as eBay, get a good second hand one, or a cheap new one! Or go to a mechanic they may have some spare, for you to buy. Hope all goes well and you get the right one for you! but I would really recommend, a mechanic.
Some exhaust systems use gaskets and some don't.
Some manufacturers of cat back exhaust systems are Flowmaster, Banks, Gibsons, Corsa, Invidia, RBP, Pacesetter, etc. These manufacturers provide different models of car back exhaust systems.
Boat's exhaust systems are located on the middle unit of the Outboard motor, but some of the fumes get in the water.
While custom exhaust systems for one's car or motorcycle maybe available locally, one may prefer to shop online for the east of finding one online. If that's the case, one can find custom exhaust systems for cars or trucks at sites such as Car ID, Street Beat Customs, Truck Exhaust Kits, Summit Racing Equipment, and systems for motorcycles are available at Motorcycle Superstore. Also, eBay Motors should have systems for any vehicle.
the spent exhaust gas goes out the exhaust
In some case it is just for looks as they are not true dual exhaust systems. In other cases they are for improved performance and are true dual exhaust systems. On most V6 or V8 cars they do improve performance. On a 4 cylinder they do very little to improve performance.
While stock diesel systems are very loud they are not the loudest type of exhaust you can get. To get an exhaust that is extremely loud you're going to need to go with the custom or bolt on route.
are you sure they are both cats. some exhaust systems have a resonator after the catylitic converter to help with sound deadening
Although I do not know much myself regarding exhaust systems, I have found that there is a wealth of information online. You can find information here repairandshare.com/exhaust-systems/ as well as here vividracing.com/catalog/exhaust-system-information-i-39.html .
Dual exhaust systems are systems in cars that have two mufflers and two exhaust pipes. This system is called a dual exhaust system, or a twin exhaust system. It can be installed on a vehicle after market.
If you want to purchase an exhaust system you could go to a place like autopartswearhouse.com. Or you could look up exhaust systems of craigslist to see if there is anyone near you selling an exhaust system.
An aftermarket performance exhaust can free some of the power in your engine. These systems allow for a quicker, more efficient path for exhaust gases to escape. This means your engine "breathes" better.