21/23Mm Expansion Chamber To Silencer Coupler Seal And Spring Kit Euro 2-Stroke Ktm Sx, Husqvarna Tc, & Gasgas Mc 65 85 105 Cc Models Using Oem 54605057000

21/23 Mm Expansion Chamber Seal Kit For 2-Stroke 60 – 105 Cc Euro Dirtbikes Ktm, Gasgas, & Husqvarna Motorcycles. Kit Replaces Old Factory Parts With Fresh Springs, O-Ring Seals, And Pipe To Silencer Coupler. Replaces Oem 54605057000 21/23Mm Sleeve.