Akrapovic Evolution Complete Line

AKRAPOVIC Evolution Exhaust System (Ref. S-H4E1-FDHLT) — Designed for off-road competition, this Evolution silencer made of titanium combines lightness and robustness for demanding motocross riders. Custom-designed for the limited space of CRF and other 450 cc machines, it optimises gas evacuation while adhering to FIM noise regulations.

The construction from high-quality titanium alloys, with varying thicknesses, reduces weight by 26.5% compared to the original exhaust and enhances resistance to shocks and trail wear. The titanium collector incorporates a resonance chamber, the silencer is sized to maximise the available space, and the profiled surface shapes the tone for a deep and full sound, without excess.

• Material: Titanium
• Type: Racing / Offroad
• Measured performance: +1.8 kW (2.5 hp) at 10,300 rpm and +1.5 Nm at 7,900 rpm (measured on a test bench vs original)
• Installation: Simple and quick, without mapping changes
• Usage: For closed circuit / private track use only — not road legal

High-end finish with durable logo marking and new titanium heat shield. Ideal for those seeking better throttle response and a livelier feel across the entire rev range, while maintaining the robustness required for extreme motocross conditions.

Common compatibilities: HONDA CRF 450 R (2026), CRF 450 RWE Works Edition (2025–2026).