Spark Exhaust Technology Aprilia RSV4 1000 RR/RF and 1100/Factory "Konix" Semi-Full Exhaust System with Titanium Cat Delete link pipe. Compatible with passenger footrest and includes a valve simulator to eliminate the original and prevent a check engine light. Designed for Maximum Performance, Looks, Weight Savings and a Rich Deep Sound only possible through the Passionate Way of Italian Work. Handcrafted in Italy. Ultra lightweight 1.8 kg., dyno tested for maximum horsepower increase over stock, sound 107 db. Non-Homologated Racing Version. *This system is compatible with rear passenger foot pegs.