The Akrapovič Evolution Line Exhaust System is engineered for the Yamaha YZ450F and constructed entirely from lightweight, high-grade titanium alloys. Part number S-Y4MET17-FDHLTA delivers a substantial weight reduction of 20.4% compared with the stock exhaust system, helping improve handling and responsiveness on closed-course competition circuits.
Different material thicknesses are used throughout the system to balance strength, protection, and weight. This design provides enhanced resilience in demanding riding conditions while supporting stronger performance across the rev range. In Akrapovič in-house dyno testing, the system produced an additional 2.4 horsepower at 10,600 rpm, along with a 1.1 lb-ft torque increase at 10,500 rpm, when compared with the standard stock exhaust.
Designed as a direct plug-and-play replacement, the Akrapovič Evolution Line system installs without requiring engine remapping. It is intended exclusively for closed-course competition use and is not designed for public-road operation. Verify compatibility with your specific Yamaha YZ450F model before installation.
Features:
- High-grade titanium construction reduces weight while maintaining strength and durability
- Evolution Line design developed for Yamaha YZ450F competition applications
- Reduces exhaust-system weight by 20.4% compared with the stock system
- Increases performance by up to 2.4 horsepower at 10,600 rpm in Akrapovič dyno testing
- Adds up to 1.1 lb-ft of torque at 10,500 rpm in back-to-back testing
- Different section thicknesses provide added protection and structural resilience
- Plug-and-play installation requires no engine remapping
- Manufacturer: Akrapovič; part number: S-Y4MET17-FDHLTA
- Intended for closed-course competition use only