Your desire is our objective: more power & torque, uncompromising race looks, significant weight saving The answer: Akrapovic complete "EVO" system - More power and torque - Identical look to our Factory Team - Manufactured entirely of high-grade titanium - Weight savings: approx. 1 kg - Additional resonance body for optimum power delivery - Manifold flow optimized for production engine - Tuned to comply with the currently valid FIM noise regulations - Akrapovic logo sticker on main silencer For the 250 SX F emphasis in power delivery was placed on an increase in power and torque in the upper speed range. Due to the increase in output in the upper speed range a modified power and torque results in the lower speed range. This means a slightly later, but as a result more spontaneous onset of full engine power from an engine speed of 6000 rev/min. Your desire is our objective: more power & torque, uncompromising race looks, significant weight saving The answer: Akrapovic complete “EVO” system -More power and torque -Exclusive muffler designed for our Factory Team -Manufactured entirely of high-grade titanium -Weight savings: approx.2.2 lbs -Additional resonance body for optimum power delivery -Manifold flow optimized for production engine -Tuned to comply with the currently valid AMA/FIM noise regulations -Akrapovic logo sticker on main silencer The 250 SX-F system was designed with an emphasis in power delivery at high RPM’s (above 6000 RPM). The 450 SX-F, includes recommended specially tuned mapping spec. (available from your Authorized KTM Dealer) FOR CLOSED COURSE COMPETITION ONLY!