Factory 4.1 RCT Exhaust Silencer 21-26 Honda CRF 450 R RX - FMF 041602

The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap leverages cutting-edge Resonance Chamber Technology™ in a compact, lightweight design. Engineered with aerospace grade materials and a precision-formed carbon end cap, this slip-on exhaust enhances power output across the RPM range while effectively centralising mass for improved handling. Designed and manufactured entirely in Southern California, it delivers superior performance gains, rapid tuning capabilities, and a significant reduction in weight, making it a premier choice for closed course applications.

Features

• Incorporates FMF Resonance Chamber Technology™ for optimised performance
• Shorter overall length minimises crash susceptibility
• Factory Forward Engineering moves muffler forward for centralised mass
• Constructed with aerospace grade stainless steel and natural aluminium, finished with a carbon end cap
• Delivers substantial power gains throughout the RPM range
• Significant weight savings over stock exhausts
• Includes Rapid Tuning System (RTS) for quick adjustments
• Equipped with spark arrestor (screen insert) and 94dB quiet insert
• For closed course use only

Specifications

• Type: Slip-On
• Configuration: Single
• Construction: Aluminium
• Finish: Natural
• Midpipe: Stainless Steel
• End cap: Carbon fibre
• Spark arrestor: Screen insert (included)
• Quiet insert: 94dB insert (included)
• Carburettor warning: No
• Item ID: 041602

Vehicle Fitment

Honda

• CRF450R (2021–2026)
• CRF450RX (2021–2026)