Spark Exhaust Technology Yamaha R6 (2017+) "Streetfighter" Titanium Full Exhaust System (WSBK Evolution). This system is the latest in the evolution lineup, designed to further improve performance in Supersport configuration engines. This full exhaust system is constructed with a titanium silencer, titanium mid-pipe and titanium racing header. The state-of-the-art system has been developed and tested using championship race teams around the world. While testing for maximum performance at Mugello in Italy, the Yamaha R6 speed record was set at 275.50 km (171.10 mph). Along with improved speed, many race teams have chosen Spark to face the Endurance World Championship due to Spark's durability and craftsmanship. From an aesthetic point of view the segmented connecting tube is striking, with beautiful welds that enhance the racing soul of this product. These precisely welded segments are more than an exercise in ascetics, but a necessary solution. After repeated bench tests such specific build qualities have tuned this exhaust for optimal torque and power. Handcrafted in Italy. Ultra lightweight approximately 4.2kg. Dyno Tested for maximum horsepower increase over stock, 100db. Non-Homologated Racing Version for Maximum Performance. For perfect performance, throttle response and durability, ECU remapping is recommended.