Skip to content
Free Shipping on orders over $69.99 to the continental 48 (Alaska & Hawaii orders, call 402-214-0706 to order).
All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
Free Shipping on orders over $69.99 to the continental 48 (Alaska & Hawaii orders, call 402-214-0706 to order).
All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
Fmf

FMF Factory 4.1 RCT Muffler - 042412 Kawasaki KX 250 2025-2026

MPN: 042412 SKU: 1821-2164
Fmf

FMF Factory 4.1 RCT Muffler - 042412 Kawasaki KX 250 2025-2026

MPN: 042412 SKU: 1821-2164
Availability:
6 in stock, ready to be shipped
Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally Achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory For closed course competition use only. Specs Product Name Muffler Type Slip-On Riding Style Off-Road End Cap Color/Finish Black Muffler Color/Finish Anodized Model Factory 4.1 RCT Pipe Material Titanium End Cap Material Carbon Fiber Muffler Material Titanium Units Each
Original price $899.99 - Original price $899.99
Original price
$899.99
$899.99 - $899.99
Current price $899.99

Product Details

Features

  • Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally
  • Achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
  • Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
  • For closed course competition use only.

Specs

Product Name Muffler
Type Slip-On
Riding Style Off-Road
End Cap Color/Finish Black
Muffler Color/Finish Anodized
Model Factory 4.1 RCT
Pipe Material Titanium
End Cap Material Carbon Fiber
Muffler Material Titanium
Units Each

Product Description

Features

  • Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally
  • Achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
  • Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
  • For closed course competition use only.

Specs

Product Name Muffler
Type Slip-On
Riding Style Off-Road
End Cap Color/Finish Black
Muffler Color/Finish Anodized
Model Factory 4.1 RCT
Pipe Material Titanium
End Cap Material Carbon Fiber
Muffler Material Titanium
Units Each

Part Numbers
Store SKU MFR. Product # Availability
1821-2164 042412 In Stock
Fitment
This product is vehicle specific. Select your vehicle to confirm fitment.

This Product Fits

Fitment Disclosure

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.

Features

  • Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally
  • Achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
  • Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
  • For closed course competition use only.

Specs

Product Name Muffler
Type Slip-On
Riding Style Off-Road
End Cap Color/Finish Black
Muffler Color/Finish Anodized
Model Factory 4.1 RCT
Pipe Material Titanium
End Cap Material Carbon Fiber
Muffler Material Titanium
Units Each