The difference between stock and custom pipes on a Harley-Davidson bike lies primarily in their design, sound, and performance characteristics.
Stock pipes: Stock pipes, also known as OEM (Original Equipment Manufacturer) pipes, are the exhaust systems that come installed on a motorcycle from the factory. They are designed to meet specific noise regulations and emissions standards. Stock pipes are typically engineered to provide a balance between performance, sound, and legal compliance. They are designed to muffle the exhaust noise and usually have a more subdued sound compared to aftermarket/custom pipes.
Custom pipes: Custom pipes refer to aftermarket exhaust systems that are designed and manufactured by third-party companies specifically for Harley-Davidson motorcycles. These pipes are often available in a variety of styles, including different shapes, finishes, and configurations. Custom pipes are known for their louder, more aggressive sound compared to stock pipes. They may have larger diameter headers, different baffles, or fewer restrictions in the exhaust flow, which can result in increased performance and power in some cases.
Do they make the bike run better or faster? Upgrading to custom pipes can potentially improve the performance of a Harley-Davidson motorcycle, but the extent of the improvement may vary depending on several factors, including the specific bike model, engine size, tuning, and overall setup. Custom pipes can help optimize exhaust gas flow, reduce back pressure, and potentially increase horsepower and torque. However, it's important to note that the performance gains may not be significant, especially if the rest of the bike's components, such as air intake and fuel management, are not also optimized for the increased airflow.
Additionally, it's worth considering that modifying the exhaust system, especially with louder aftermarket pipes, may result in non-compliance with noise regulations in some areas. It's essential to check local laws and regulations regarding aftermarket exhaust systems before making any modifications.
Ultimately, the choice between stock and custom pipes depends on personal preferences for sound, aesthetics, and desired performance characteristics. If you are considering upgrading your exhaust system, it is advisable to consult with knowledgeable experts or professionals who can guide you in selecting the right aftermarket pipes for your specific Harley-Davidson model and help ensure optimal performance and compliance with local regulations.