S&S Grand National Slip-On Exhaust Muffler for 2025-2026 Harley Softail - Black

Product Description

S&S Cycle Grand National Slip-On Muffler for 2025 M8 Softail Standard Chassis - Black

Slip-on muffler for 2025 Harley-Davidson M8 Softail Standard Chassis models. Designed to optimize exhaust flow and deliver aggressive sound while maintaining classic styling. Guardian black finish. 4.0" muffler shell with Grand National end cap. Removable dB reducer included (J2825 compliant). 50-State compliant. Qualified manufacturer declared U.S. 50-State legal emissions compliant part. Combines S&S advanced engineering with traditional Softail design cues for enhanced performance, sound, and overall riding experience.

Fitment

• 2025 Harley-Davidson Street Bob (FXBB)
• 2025 Harley-Davidson Low Rider S (FXLRS)
• 2025 Harley-Davidson Low Rider ST (FXLRST)
• 2025 Harley-Davidson Heritage Classic (FLHC)
• Softail Standard Chassis models only

Features & Benefits

• Guardian Black Finish - Durable, classic black coating
• 4.0" Muffler Shell - Optimized diameter for performance and sound
• Grand National End Cap - Signature S&S styling
• 50-State Compliant - Legal in all 50 states, emissions compliant
• Removable dB Reducer - J2825 compliant, adjustable sound level
• Optimized Exhaust Flow - Engineered for enhanced performance
• Aggressive Sound - Distinct, powerful exhaust note
• Classic Styling - Complements Softail's traditional design cues
• S&S Advanced Engineering - Proven performance technology

Why Upgrade?

The 2025 Softail is known for its performance-oriented design and modern features while maintaining classic styling. S&S Cycle created the Grand National slip-on muffler to perfectly complement this blend of tradition and technology. This isn't just a louder pipe—it's advanced engineering designed to optimize exhaust flow, improve performance, and give your Softail a distinct, aggressive sound while staying true to its iconic roots. The 4.0-inch muffler shell and Grand National end cap deliver signature S&S styling. Guardian black finish ties into the Softail's classic look. Removable dB reducer is J2825 compliant, so you can adjust sound levels to your preference. Most importantly, this muffler is 50-State compliant—qualified manufacturer declared legal in all 50 U.S. states for 2025 Street Bob, Low Rider S, Low Rider ST, and Heritage Classic Softail models. If you want better sound, better flow, and better performance without compromising legality or classic styling, the S&S Grand National slip-on is the answer.

Note: S&S Cycle Grand National Slip-On Muffler for 2025 M8 Softail Standard Chassis - Black. Part 550-1159. Fits 2025 Harley-Davidson Street Bob (FXBB), Low Rider S (FXLRS), Low Rider ST (FXLRST), Heritage Classic (FLHC). Softail Standard Chassis models only. Guardian black finish. 4.0" muffler shell. Grand National end cap. Removable dB reducer (J2825 compliant). 50-State compliant. Qualified manufacturer declared U.S. 50-State legal emissions compliant part on all 2025 Harley-Davidson Street Bob, Low Rider S, Low Rider ST, Heritage Classic Softail models. Optimized exhaust flow for enhanced performance and aggressive sound.