If you're looking for a peak in power without majorly re-modifying your engine, the Yamaha's YFZ 450 exhaust system is a quality exhaust that not only gives you a great horsepower gain, but is built to last.
Made with TIG Welded 304 Stainless Steel, which is used for its long-term cost effectiveness and inherent corrosion resistance, the YFZ 450 boasts an impressive 94 dB with a Quiet Core (or 103 dB without) and easily slips on within a few minutes. It also provides a 10-25% gain in overall HP. This exhaust works both for professional riders and weekend riders alike, and gives off that great sound you'd expect from a performance exhaust right out of the box. It's also lighter than a stock system, which makes this exhaust an easy improvement to make your machine faster.
Some of the YFZ 450's features include different color options for the billet muffler clamps, the powder coating available on the pipe, and the ceramic coating on the silencer. It also has removable aluminum heat shields to protect your pipes. Bottom line - it's a visually appealing exhaust that's gonna last through several rides. Check it out and let us know what you think!