FMF 042382 Factory 4.1 RCT Aluminum Slip-On Muffler

The FMF Factory 4.1 RCT Slip-On Muffler is a high-performance exhaust solution engineered to unlock your dirt bike's full power potential. Designed specifically for Kawasaki KLX140 models, this slip-on muffler combines FMF's advanced Resonance Chamber Technology (RCT) with aerospace-grade construction to deliver significant performance gains while reducing weight.

Key Features:

• Resonance Chamber Technology: Patent-pending internal and external chamber design enhances exhaust pressure waves for optimal power output across the entire RPM range
• Factory Forward Engineering: Shorter overall length moves the muffler closer to the motor, centralizing mass for improved handling and reduced crash damage susceptibility
• Premium Construction: Aluminum canister with stainless steel midpipe and stainless steel end cap, manufactured 100% in Southern California
• Lightweight Design: Weighs only 3.6 lbs, offering substantial weight savings over stock exhaust
• Enhanced Performance: Delivers massive power gains throughout the RPM range while improving both top-end pull and low-end torque
• Sound Compliance: Patented core shape lowers sound levels while maintaining maximum power, meets AMA and FIM sound requirements
• Easy Tuning: Innovative rear endcap design allows simple installation of tuning tip inserts or spark arrestor (screen insert spark arrestor included)
• Natural Finish: Features natural aluminum finish with oval case shape and wrapped perforated core construction

Manufactured from premium American materials and built to FMF's exacting specifications, the Factory 4.1 RCT slip-on muffler delivers professional-grade performance for serious riders. The patented canister shape increases internal volume for more sound-absorbing material, while the exclusive chamber design enhances and refines exhaust pressure for maximum efficiency.

What's Included: Slip-on muffler with stainless steel midpipe, stainless steel end cap, and removable screen insert spark arrestor. Quiet insert available separately. Closed course use only.