Engineered for Yoshimura RS4 muffler: Ensures perfect fit and compatibility for CRF 300L
Approximately 6 dB noise reduction at idle: Substantially quieter ride without sacrificing sound character
Maintains or enhances power delivery: Keeps performance intact while making the engine more refined
Compatible with or without Yoshimura spark arrestor: Offers flexible installation options
Street-friendly design: Reduces noise for improved riding comfort
Summarized by Shop
Engineered for the CRF 300L Yoshimura RS4 muffler, this quiet insert delivers measurable noise reduction without sacrificing performance. Compatible with or without the Yoshimura spark arrestor, it achieves approximately a 6dB reduction at idle and 5500RPM—translating to roughly 30% perceived sound pressure reduction. Due to the logarith