Cobra Classic 4 Slip-On Mufflers Honda Gold Wing Gl1800 Cobra's slip-ons for Gold Wing models are loved by many real world riders. Cobra mufflers offer increased horsepower and torque with a more aggressive exhaust note. These 4 mufflers also boast proprietary technology to prevent them from bluing. The louvers in the baffle are positioned further back within the muffler, giving gasses the chance to cool before leaving the silencer core and stopping any bluing from occurring. Features: Adds just the right sound to your Gold Wing Deep and mellow exhaust note Simple slip-on installation and Cobra limited lifetime warranty Made in the USA