Parts such as the Exhaust Muffler: Pipe Comp,exh, Packing,protector (nas), Muffler Comp.,ex., Nut,hex,cap,8mm are included in the Cn250 Helix 1991 (m) France Kph Yb Exhaust Muffler parts fiche.
The lowest price component in this Exhaust Muffler parts-list fiche is the Washer,plain 6mm.
On this parts fiche the Packing,protector (nas) is the most specified component.