S&S Cycle 4-1/2 Inch Grand National Slip-On Muffler for 2022-Up Harley-Davidson Nightster

S&S Cycle 4-1/2 Inch Grand National Slip-On Muffler for 2022-Up Harley-Davidson Nightster

The Nightster deserves an exhaust that respects the Sportster DNA it carries and gives the Revolution Max 975 the voice to match its character. The S&S Grand National slip-on wraps around the modern drivetrain with a classic flat-track inspired profile, adds real horsepower, and lets riders tune the sound from throaty street-legal to wide-open race note without touching anything but a few bolts.

Key Features

• Grand National Thruster machined end cap with flat-track heritage styling
• Color-matched to the factory header and heat shield for a seamless appearance
• Removable dB reducer is J2825 compliant and allows sound level tuning
• Delivers +12 HP and +7.55 Nm torque over the stock muffler
• Made in the USA by S&S Cycle

Technical Specifications

• Diameter: 4-1/2 inches
• Finish: Black, color-matched to factory header and shield
• End Cap: Grand National Thruster, machined
• Sound: Removable dB reducer, SAE J2825 compliant
• Performance: +12 HP / +7.55 Nm torque
• Fitment: 2022-Up Harley-Davidson Nightster RH975
• Origin: Made in USA

Fitment Notes

• Fits 2022 and newer Harley-Davidson Nightster (RH975) models
• Designed to use the stock header – no full exhaust system required
• Removable dB reducer included; removal may not be street-legal in all jurisdictions – verify local regulations
• Review the Fitment tab for the complete year and model breakdown