Euro 4/5 homologated. With a plain un-polished finish. Handcrafted from AISI 304 stainless steel. With anodized aluminum end caps. With 4.4kg these slip-ons are 3.6kg lighter than stock and despite being homologated they still add up to 1 horsepower. Complete with the distinctive Zard sound. Note: No adjustments required to injection or ignition. Note: This are EU homologated slip-on exhaust mufflers. Removing or modifying the Db killer on homologated mufflers will void the warranty and the homologation. Certification is valid for unmodified stock bikes, for the specific models and model years as mentioned in the product descriptions (Directive 97/24/CE, EU regulation 134/2014). The approval number, shown on the supplied relevant certificate, is stamped on both mufflers and it must be presented to law enforcement when checked.