Akrapovic Kawasaki Ninja ZX-10R 21-25, Ninja ZX-10RR 21-25 Optional Link Pipe (Titanium) - L-K10SO9Made from high grade titanium, the optional link pipe is designed to be used with both the Slip On Line (Carbon) and Slip On Line (Titanium) exhausts. It delivers an increase in power and torque, and creates an improved linear curve across the entire rev range, coupled with weight savings. When installed on the Slip On Line (Carbon), the sound becomes louder to boost to the senses, and when added to the Slip On Line (Titanium) the unique sound is