Welcome to the RZR4 Two Bros Exhaust Install. The full dual exhaust comes well packed , and the quality of this system is exceptional.The first step in the exhaust install is to remove the plastic panel behind the rear seats that closes the engine compartment off from the passenger compartment.Next remove the springs holding the header to the muffler.Remove the two retainer springs that hold the muffler to the frame should be removed next.There are four bolts that must be removed form the muffler bracket, two on the front of the bracket and two on the back of the bracket.Once the muffler bracket bolts are removed from the header, simply slide the muffler toward the passenger side of the vehicle.Remove the muffler bracket retaining bolts located above the rear tire.Remove the six header flange bolts holding the header to the engine block.Remove the header from the vehicle.These are the exhaust canister brackets that will hold the new mufflers to the chassis.Bolt the exhaust brackets to the chassis as shown.There is a fuel vent line that runs underneath the rear seat mount bar that runs just above the frame, it should be re-routed below the frame and zip tied to the frame or other hoses to prevent it from being burned by the new exhaust pipes.Install rubber sleaved retaining bracket and zip tie to the hoses as shown. This will keep the hoses from making contact with the new exhaust pipes.Install header collars and flanges into the engine block.These are the supplied exhaust tubes and hardware.Install new exhaust pipes using supplied retaining springs.Make sure to pull hard on the exhaust pipes once all retaining springs are installed to make sure they are secure.Install driver side exhaust pipe and secure retaining springs.Loosely attach slip tubes to the exhaust canisters.Secure using supplied boltsAttach slip tubes to exhaust.Attach muffler pipes to header pipes and secure muffler canisters to brackets using supplied bolts.Last, tighten X rings on the back of the exhaust canisters to pipes.Re-install the rear fascia and you’re done! This system looks and sounds awesome, improves throttle response and horsepower across the entire RPM band, and can be installed in 2-3 hours. All Two Brothers Exhaust systems can be modified with two different kinds of silencers, as well as different colored exhaust tips. For more information the Two Bros Dual Exhaust System, click here.