Spark Exhaust Technology Kawasaki ZX-6R (2009+) "Streetfighter" Titanium Full Exhaust System with Catalyst Eliminating Titanium Mid-Pipe and Titanium Header. Constructed with a titanium silencer, mid-pipe, and racing header. Handcrafted in Italy. Ultra lightweight 2.8 kg., dyno tested for maximum horsepower increase over stock, sound 102 db. The research and development of the best performance continues from Sparks racing efforts in WSSP600 World Championship along with racing in Italian and French Racing Series. Non-Homologated Racing Version for Maximum Performance. For perfect performance, throttle response and durability, ECU remapping is recommended.