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YAMAHA WR450F 2024-2025 - Akrapovic Exhausts - S-Y4MET16-FDHLTA
£1,662.00
Model Compatibility
- Yamaha WR450F (2024–2026)
- Yamaha YZ450F (2023–2025)
- Yamaha YZ450FX (2024–2026)
Note on Prior Generations: If you own a 2023 model of the WR450F, this exhaust will not physically fit because it was built on the older chassis layout. The total chassis and frame spars update implemented on the 2024+ WR450F aligned it directly with the 2023+ YZ450F bodywork dimensions.
Key Performance Specifications
- Road Legality: Strictly not street legal. It is an un-catalysed competition system engineered exclusively for closed-course racetrack or off-road competitive use.
- Bespoke Titanium Build: The complete assembly—including the header loop, intermediate conical link segments, internal cores, and outer muffler body sleeve—is crafted entirely from premium, lightweight titanium alloys.
- Weight Reduction: Saves 20.4% (0.9 kg) off the total mass of the highly restrictive factory original single-piece exhaust setup.
- Performance Maximisation: Drops internal backpressure to yield a sharp increase of 2.4 hp (+1.8 kW) at 10,600 rpm and 1.5 Nm of torque at 10,500 rpm. It utilizes an integrated header resonance chamber to smooth out low-end throttle snap and boost response across the rev range.
- Noise Regulation Compliance: Specifically engineered featuring custom internal baffling to cleanly comply with standard static FIM trackside competition noise thresholds (109 dB).
- Tuning Requirements: True plug-and-play track setup. It runs smoothly out of the box with no mandatory ECU fuel mapping changes required.
Advanced Off-Road Architecture
- Imprinted Branding: This system incorporates a specialized debossed/imprinted logo technique directly on the surface of the titanium outer sleeve. It completely avoids adhesive stickers or deep mechanical etchings, ensuring the branding will not peel or burn off during intense mud riding and high-pressure washing. [1, 2, 3, 4]
- Reinforced Bracket: Manufactured with a heavy-duty, robotically welded titanium mounting bracket designed to survive severe casing strains or crash impact distortions on the trails. [1, 2]