FMF Factory 4.1 Mini Exhaust Full System

This product is a Mini Factory 4.1 Full System Exhaust designed for a similar look and sound to 4.1 RCT big bike products, with features like a shorter length, increased internal capacity, and a rapid tuning system.

• The description claims massive power gains throughout the RPM range.
• The description claims the product is quieter than stock.
• The description claims huge weight savings.
• The description claims stainless steel header and end cap.
• The description claims inclusion of a combination Quiet / Spark Arrestor insert.
• The description claims compatibility with U.S. Forestry Service Approved Spark Arrestor.
• The description claims being #1 Exhaust in AMA Supercross Series, AMA Motocross Series, FIM Motocross of Nations.