Spark Exhaust Technology Yamaha R1 (2015+) "Streetfighter" Titanium Full Exhaust System 65MM (WSBK Evolution). Constructed with a titanium silencer, titanium mid-pipe, and titanium racing header. The full system is the state-of-the-art product developed together with teams racing important championships all over the world. Besides the study of the collectors' best sizing for performance optimization, the technologies and the structural details of such product ensure top reliability. In fact, many teams have chosen Spark to face the Endurance World Championship. From the aesthetic point of view the segmented connecting tube is striking, with visible weldings enhancing the racing soul of the product. Weldings, segments and cones that are not merely a formal exercise but necessary solutions: after repeated bench tests such specific cones - out of the production standards - have been chosen as they allow the best torque. Handcrafted in Italy. Ultra lightweight approximately 3.6kg.Â Dyno Tested for maximum horsepower increase over stock, 102db. Non-Homologated Racing Version for Maximum Performance.Â Â Warning: neither Spark, Vecchi SRL, or MOTO-D make any representation that the products comply with the air and/or noise emissions laws, or labeling laws, of any jurisdiction. The purchasers are entirely responsible for informing themselves of the applicable laws where the products are to be used and to comply with those laws. Emissions Warning / USA: Various U.S. states and the U.S. federal government have individual laws regulating the use of aftermarket exhaust parts and systems, especially as those parts and systems modify, remove, or replace original equipment catalysts. Please consult the appropriate laws in your area before installing any aftermarket part or system on your vehicle to ensure compliance with all applicable laws. Neither Spark, Vecchi SRL, or MOTO-D or the sellers of the parts or systems make any representation that any of their parts or systems comply with any such laws. Warning / California: California laws prohibit the use of any aftermarket exhaust part or system that modifies, removes or replaces original equipment catalysts unless the California Air Resources Board has issued an Executive Order regarding such part or system or unless the part or system is exempted by being used only on racing vehicles on closed courses. Neither Spark, Vecchi SRL, or MOTO-D make any representation that any of their parts or systems has received such an Executive Order or that any of their parts or systems conform with the racing vehicles exemption. The purchasers are entirely responsible for informing themselves of applicable California laws and to comply with those laws.