Spark Exhaust Technology BMW S1000RR "GP" Full Exhaust System (09-19). Constructed with a stainless mid-pipe and stainless racing header. Handcrafted in Italy, Ultralight approximately 4.8kg. Dyno Tested for maximum horsepower increase over stock, 113 db. Non-Homologated Racing Version for Maximum Performance. For perfect performance, throttle response and durability, ECU remapping is recommended.