Spark Exhaust Kawasaki Ninja ZX-4RR "Force Evo" Full Exhaust System. This ZX-4RR full exhaust system has a carbon ending titanium silencer in 400mm size, catalyst eliminating stainless mid-pipe and stainless racing header. Designed to maximize performance as noted by the extensively designed off the dyno 4-2-1 stainless manifold with 350mm diameter and tapers perfectly tuned for maximum output. Handcrafted in Italy, approximate weight 10.3 lbs (4.7 kg), sound level 104.5 db. (vs. stock @ 94.9 db). For perfect performance, throttle response and durability, ECU remapping is required. Includes both hangar to chassis for race use and a dedicated mount kit to keep the passenger footpegs for street riders. *Does not include removable DB Killer (SP-G999).