51mm Motorcycles GP Stainless Steel Exhaust Pipe Muffler Extension Spring For YamahaDescription:Hand pipe welder scale、 shape coarse ore304 stainless steel、glass fiber cottonFinish:stainless steel、imitation titaniumIf modified front、 front-end interface to 5.1 cm can be inserted directly installedIf no modification front can be original after resection、 and then the soldering of this product、recommended above 150CCSound characteristic: the same posterior segment、 loaded with different brands of engine displacement、loaded with different sound different displacement engine、 the sound is different.SpecificationOverall Length: about 38.3 cmInterface Diameter: 5.1 cmExhaust muffler core diameter:4.8cmPackage Included:1 X Motorcycle Exhaust Pipe Muffler