BSL Products GmbH is an Austrian manufacturer specializing in exhaust systems and air-filter products for Harley-Davidson motorcycles. The brand combines custom styling with performance-focused engineering, offering exhaust systems for a wide range of models, from classic Panhead and Shovelhead bikes to Evolution, Twin Cam, and Milwaukee-Eight motorcycles. Its collections include Clubstyle, Chicano, Hot Rod, fishtail, touring, and other custom-inspired designs, with finishes such as polished, black, and chrome options.

BSL also produces Air Perform air cleaners, designed to complement its exhaust systems and available in multiple styles and finishes. The product range includes headers, slip-on mufflers, end caps, heat shields, baffles, and other small parts. Customers can use BSL’s online configurator to explore exhaust options for their motorcycle model, and the company provides installation instructions, technical tips, FAQs, and product information. BSL emphasizes road-legal products, noting worldwide road legality for its exhaust systems and approval documentation for selected air cleaners. Its website also features custom-bike projects, news, catalogs, and a shop for browsing and purchasing products.