CODE:16-061-04・Stainless steel exhaust pipe: Φ31.8-Φ50.8・Aluminum silencer: SESMIC-mini L=350mm・Silencer insertion diameter: Φ52・Weight: 2.52kg (STD: 4.78kg)・Volume: 82dB (proximity)/ 79dB (acceleration)government certified muffler (compatible model: 8BJ-JA65)Compatible with H28 noise regulations/R2 exhaust gas regulationsDrain bolt: 〇Tandem: 〇STD under guard: ×