IXIL Slip-On Exhaust RC3B - Kawasaki ZX 25 R / ZX 4 R / ZX 4 RR (2023-2024) IXIL IXIL RC3B Slip-On silencer for the Kawasaki ZX 25 R. Ships from Portugal. Kawasaki ZX 25 R Kawasaki ZX 4 R Kawasaki ZX 4 RR