Details:

• The Factory 4.1 RCT integrates FMF's resonant chamber technology both internally and externally
• It also achieves a shorter overall length that is less susceptible to damage
• Factory Forward Engineering: the muffler is moved closer to the engine to shift weight to the center
• 100% manufactured in the Southern California factory 
• Massively more power throughout the rev range
• Huge weight savings
• RTS (Rapid Tuning System)