You are going to need to have them welded in as anything you get that will bolt in wont be large enough to tone it down. How to make a car exhaust quieter 5 ways to quiet an exhaust cars january 17 2019 july 1 2020.

Speedpro Cobra Hypershots Xl Full System 2in1 Underengine Kawasaki Z 650 Versys 650 Ninja 650 2017
How to quiet down cobra exhaust. Its a simple process. Tough on the ears imo. It may sound like a rip snortin fire breathin race bike but it will perform more like an overloaded high mileage rental car at altitude. First we will start with the easiest of all. Also when driving down the highway your exhaust note is generally not that loud or painfull. If you want quieter at idle and cruising look into the larger oval case mufflers.
There are a couple options you can go with. How to install 1 quiet core in dg o serries muffler and noise level comparison duration. The factory pipes are not only loud but harsh and blatty. In fact having an overly noisy exhaust is even illegal in some places. Pull out all the old silencer packing material and clean the core. Installing stock pipes instead of the current ones you possess will decrease the noise that your exhaust creates.
Start by taking the exhaust silencer off the exhaust and disassemble until you have access to the material in the silencer. Step 2 remove the mufflers inner core carefully pulling out any remaining exhaust packing material. I cut out the factory mufflers and welded in some cobra mufflers from classic chambered exhaust. Not only is the exhaust note quieter it has a more mellow sound. It doesnt hurt to blow out the silencer with compressed air if you can. This is because the exhaust system has been designed to create a bit of back pressure in order to scavenge more spent exhaust gasses from the combustion chamber.
There is honestly nothing thats more irritating than hearing a car with a loud exhaust ripping down your street. Drill out the rivets securing the mufflers end cap using the bit provided in the re pack kit. Fortunately there are some ways you can quiet your car. However if you are looking for a sure fire way to turn it down without swapping your old pipes in for different ones try the solutions below.