S&S Cycle S&S Grand National Slip-On Muffler For Harley Nightster 2022-2026

S&S Cycle Grand National: Flat Track Soul for the Nightster 975T

The S&S Cycle Grand National Slip-On Muffler for the 2022-2026 Harley-Davidson Nightster (RH975) is designed for the rider who wants to bridge the gap between classic Harley-Davidson heritage and modern liquid-cooled performance. The Revolution Max 975T engine is a sophisticated powerplant, but its factory exhaust is often criticized for being overly quiet and visually bulky. The Grand National muffler solves both issues. Drawing inspiration from S&S Cycle’s dominant presence in American Flat Track racing, this slip-on features a compact, aggressive profile that reduces weight and exposes more of the Nightster’s unique trellis frame and swingarm. Finished in a high-temperature Matte Black Ceramic, it perfectly matches the dark, industrial aesthetic of the Nightster platform.

Internal Engineering and Versatile Sound Profile

What sets the Grand National apart from generic slip-ons is its internal baffle design. S&S Cycle has tuned the muffler to provide a deep, rhythmic “bark” that highlights the 60-degree V-twin’s firing order without becoming “tinny” at high RPMs. A standout feature of this system is the removable dB reducer. This allows the rider to choose between a street-compliant, sophisticated tone or a raw, high-flow exhaust note that screams performance. The high-flow perforated core is wrapped in race-grade acoustic packing, ensuring that the sound quality remains consistent and “bass-heavy” throughout the entire rev range. This engineering also reduces backpressure, allowing the 975T engine to spool up faster and deliver more immediate mid-range torque.

Expert Tuning & Installation Advice

As experts in the Revolution Max platform, we’ve found that the Nightster responds incredibly well to improved exhaust flow. Pro Tip: While this is a “plug-and-play” slip-on that does not technically require a remap, the 975T engine utilizes a sophisticated ECU that manages heat very tightly. To get the smoothest throttle response and the most “pop-free” deceleration, we recommend using a high-flow air filter in conjunction with this muffler. Installation Note: The Nightster’s factory exhaust uses a specific mounting bracket and gasket. Ensure the original graphite gasket is in good condition; if it is frayed or crushed during the removal of the stock pipe, replace it with a new OEM unit to prevent leaks. Always wipe the ceramic finish with a clean microfiber cloth and window cleaner before the first start to remove oils that could bake into the finish.

Legendary Performance, Modern Execution

Every S&S Cycle Grand National muffler is 100% Made in the USA in Viola, Wisconsin. S&S has been the go-to name for Harley-Davidson speed since 1958, and this system for the 2022-2026 Nightster carries that legacy into the liquid-cooled era. It provides a more aggressive lean angle, a thunderous soundtrack, and a significant weight savings over stock. For the rider looking to modernize their Nightster 975T with a touch of race-track soul, the S&S Grand National is the definitive exhaust solution.

Fitment Note: Fits all 2022-2026 Nightster and Nightster Special models. Re-uses factory mounting points and heat shields for a seamless, factory-integrated look.