Steel Exhaust Neck Factory Fatty

The Factory Fatty resembles the legendary “works” or cone exhausts that were used in the past by factory teams and incorporates many of the same quality and manufacturing features.

It broadens and smooths the power curve, increasing performance across the entire rpm range, offering more low-end torque, a stronger mid-range, and increased over-rev.

Features:

• Lighter 20 gauge steel for the exhaust body
• 19 gauge steel for the neck (header) section
• Hand-formed seams for smooth flow transitions

Note: Does not comply with FIM 2025 noise regulations.

Suitable for RIEJU MR 250 21-23.