Off-Road/MX Motorcycle Exhausts - Four Stroke Mufflers

Mufflers can be used as a component when upgrading your existing exhaust system, allowing you to attach aftermarket mufflers to existing OE headers or as part of an upgraded full system when purchasing separate aftermarket headers. There's a lot of possibilities available when considering an aftermarket exhaust for your four stroke dirt bike. We carry four stroke dirt bike mufflers from brands like FMF, Pro Circuit and Yoshimura.

Shop by Brand: FMF | Yoshimura | Akrapovic Exhaust | Pro Circuit | Vance & Hines

FMF Factory 4.1 RCT Slip-On Exhaust for KX250F 09-16 FMF Factory 4.1 RCT Slip-On Exhaust for 350 SX-F 07-15 Pro Circuit T-6 Slip-On Exhaust for KX250F 09-16 Yoshimura RS-4 Stainless/Aluminum Slip-On Muffler for WR450F 12-13
From $327.99
From $307.49
$464.95 $381.26
Available, only 2 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$395.00 $355.50
Available, only 1 left Ships Fri, Dec 01 if ordered within 17hr 58min 
 
FMF Q4 Slip-On Exhaust for CRF250X 04-09 Yoshimura RS-2 Competition Series Slip-On Muffler for CRF150R 07-08 FMF Factory 4.1 RCT Slip-On Exhaust for YZ250F 11-13 FMF Q4 Slip-On Exhaust for WR250F 07-14
$379.99 $311.59
Available, only 1 left Ships Tue, Dec 05 if ordered within 17hr 58min 
$345.00 $310.50
Available, only 2 left Ships Fri, Dec 01 if ordered within 17hr 58min 
From $327.99
$379.99 $311.59
Available, only 4 left Ships Fri, Dec 01 if ordered within 17hr 58min 
 
Yoshimura RS-4 Competition Series Slip-on Muffler for 450 SX-F 11-13 FMF Titanium Powercore Slip-On Exhaust for WR450F 07-11 FMF Q4 Slip-On Exhaust for 250 XCF-W 07-08 FMF Powercore 4 Slip-On Exhaust for CRF450R 02
$425.00 $382.50
Available, only 5 left Ships Tue, Nov 28 if ordered within 17hr 58min 
$379.99 $311.59
$379.99 $322.99
May need 1-5 business days to ship 
$329.99 $270.59
Available, only 2 left Ships Tue, Nov 28 if ordered within 17hr 58min 
 
FMF Q4 Slip-On Exhaust for WR426F 98-02 FMF Powercore 4 Slip-On Exhaust for CRF450R 04 FMF Powercore 4 Hex Slip-On Exhaust for KX250F 09-16 FMF Powercore 4 Slip-On Exhaust for CRF250R 04-05
$379.99 $311.59
Currently Unavailable
$329.99 $270.59
Available, only 1 left Ships Tue, Nov 28 if ordered within 17hr 58min 
$329.99 $270.59
Available, only 2 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$329.99 $270.59
Available, only 3 left Ships Tue, Nov 28 if ordered within 17hr 58min 
 
FMF Powercore 4 Hex Slip-On Exhaust for CRF450R 13-16 Pro Circuit Ti-4 Slip-On Exhaust for CRF250R 04-05 Akrapovic Racing Line w/ Standard Muffler for YZ250F 14-15 FMF Factory 4.1 RCT Slip-On Exhaust for 250 SX-F 15
$339.99 $278.79
Available, only 3 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$524.95 $430.46
Available, only 1 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$897.95 $763.26
Available, only 2 left Ships Fri, Dec 01 if ordered within 17hr 58min 
From $318.74
 
FMF Powercore 4 Hex Slip-On Exhaust for 250 XCF-W 08-14 Pro Circuit T-6 Slip-On Exhaust for CRF450R 17 FMF Factory 4.1 RCT Slip-On Exhaust for CRF250R 11-13 Yoshimura RS-9D Slip-On Muffler for CRF450R 13
$329.99 $270.59
Available, only 3 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$748.95 $614.14
Available, only 1 left Ships Fri, Dec 01 if ordered within 17hr 58min 
From $361.24
$725.00 $652.50
Available, only 3 left Ships Fri, Dec 01 if ordered within 17hr 58min 
 
Akrapovic Slip-On Exhaust for KX250F 09-16 Yoshimura RS-3D Dual Oval Slip-On Mufflers for CRF250R 06-08 FMF Titanium Powercore Slip-On Exhaust for YZ250F 06-09 FMF Factory 4.1 RCT Slip-On Exhaust for CRF450R 13-16
$589.95 $507.36
Available, only 1 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$445.00 $400.50
May need 1-5 business days to ship 
$379.99 $311.59
From $409.99
 
FMF Factory 4.1 Slip-On Exhaust for CRF150R 07-16 FMF Powercore 4 Hex Slip-On Exhaust for RM-Z250 11-12 FMF Powercore 4 Slip-On Exhaust for CRF230F 03-15 FMF Q4 Hex Slip-On Exhaust for 350 XCF-W 08-16
From $327.99
$329.99 $270.59
Available, only 1 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$299.99 $254.99
Available, only 2 left Ships Tue, Nov 28 if ordered within 17hr 58min 
$379.99 $311.59
Available, only 5 left Ships Tue, Nov 28 if ordered within 17hr 58min 
 
FMF Powercore 4 Slip-On Exhaust for CRF250R 10 FMF Powercore 4 Slip-On Exhaust for CRF150F 03-10 Yoshimura RS-4 Competition Series Slip-on Muffler for 350 SX-F 11-12 FMF Powercore 4 Slip-On Exhaust for CRF250X 04-09
$329.99 $270.59
Available, only 3 left Ships Fri, Dec 01 if ordered within 17hr 58min 
$299.99 $254.99
Available, only 2 left Ships Tue, Nov 28 if ordered within 17hr 58min 
$425.00 $382.50
Available, only 5 left Ships Tue, Nov 28 if ordered within 17hr 58min 
$329.99 $270.59
Available, only 3 left Ships Tue, Nov 28 if ordered within 17hr 58min 
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