Spark Exhaust Technology BMW S1000RR (09-19) "Konix" Full Exhaust System 65MM (WSBK Evolution). Constructed with a titanium silencer, titanium mid-pipe, and stainless racing header. Handcrafted in Italy. Ultralight approximately 5.5 kg. Dyno Tested for maximum horsepower increase over stock, sound 108 db. Non-Homologated Racing Version for Maximum Performance. For perfect performance, throttle response and durability, ECU remapping is recommended.