Akrapovic Complete Evolution Exhaust System S-H4E1-FDHLT For CRF 450R

Engineered to fit perfectly within the tight confines of modern off-road motorcycles, the Akrapovič Evolution Line (Titanium) is built to deliver uncompromising performance and durability in the toughest racing conditions.

Constructed from premium high-grade titanium alloys, with varying material thicknesses for optimal protection and weight reduction, this system is 26.5% lighter than the stock exhaust. The lightweight design enhances agility and overall handling, making a noticeable difference in demanding terrain.

A specially profiled muffler surface helps the system meet 109 dB FIM noise limits, while adding strength and durability. The result is a deep, full racing sound that complements the balanced pulse of a single-cylinder engine without exceeding competition standards.

The muffler is engineered to be the largest possible within the available space. This maximises sound dampening to reduce environmental impact, while also improving exhaust gas flow for stronger performance and smoother power delivery.

Key Features:

• Full Evolution Line system in premium titanium
• 26.5% lighter than stock exhaust
• Titanium header with integrated resonance chamber
• Newly designed titanium heat shield
• Meets 109 dB FIM noise limits
• Deep, full racing sound
• Increased durability for extreme off-road use
• Largest possible muffler design for improved flow and silencing
• +1.8 kW (2.5 HP) power gain
• +1.5 Nm torque increase
• Plug-and-play installation – no remapping required