Discoloration (blueing) is the result of tuning characteristics, cam timing, carburetor jetting, overheating, etc. And is not caused by defective manufacturing. NOTE: Installation of a new exhaust system may change your motorcycles fuel-air mixture requirements. Or after, installing their product. Super Glide Sport EFI FXDXI.Super Glide Custom EFI FXDCI. Powered by SixBit's eCommerce Solution. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Exhausts & Exhaust Systems\Exhaust Systems". The seller is "m40powersports" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Croatia, Republic of, Malaysia, Brazil, Colombia, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam, Uruguay.