The Genuine Harley Davidson 65600177 Header Pipe Assembly HDI CATALYST is a high-quality exhaust header designed specifically for street motorcycles. This bolt-on header pipe features a pre-catalyst oxygen sensor location, ensuring optimal performance and efficiency. Manufactured by Harley-Davidson, this part is a genuine product that guarantees a perfect fit and reliable function for your motorcycle. Upgrade your exhaust system with this authentic Harley-Davidson header pipe assembly for a smooth and powerful riding experience.