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4-Stroke Exhaust Systems

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169 Results

Pro Circuit
T-4R GP Complete Exhaust

$737.99
Sale
Save 10%
5 out of 5 stars (5) reviews

Pro Circuit
T-5 Complete Exhaust

$573.77 - 737.99
Clearance
Up to 30%
5 out of 5 stars (2) reviews

GYTR
Stainless Steel Exhaust System - 99 dBA

$709.95
5 out of 5 stars (1) review

Yoshimura
RS-9T Slip-On Exhaust - Dual

$729.00 - 749.00
5 out of 5 stars (5) reviews

KTM PowerParts
FMF Factory 4.1 RCT Muffler

$649.99
5 out of 5 stars (1) review

Yoshimura
RS-9D Slip-On Exhaust - Dual

$689.00 - 809.00
5 out of 5 stars (3) reviews
Video Available

FMF
Factory 4.1 Titanium Slip-On RCT - Carbon Fiber

$494.99 - 607.49
Sale
Up to 10%
5 out of 5 stars (2) reviews

GYTR
FMF Powercore 4 Muffler

$349.99
4.5 out of 5 stars (22) reviews

KTM PowerParts
FMF Powercore 4 Silencer

$449.99
5 out of 5 stars (1) review

Yoshimura
RS-3 Comp Series Slip-On Exhaust

$399.00
4.5 out of 5 stars (13) reviews
Video Available

Yoshimura
RS-2 Comp Series Slip-On Exhaust

$339.00 - 419.00
Sale
Up to 5%
5 out of 5 stars (15) reviews
Video Available

Pro Circuit
T-4 Slip-On Exhaust - Dual Without Midpipe

$496.99
Sale
Save 10%
5 out of 5 stars (3) reviews

FMF
Factory 4.1 RCT Slip-On Exhaust

$337.49 - 607.49
Sale
Up to 10%
5 out of 5 stars (88) reviews

Yoshimura
RS-4 Comp Series Slip-On Exhaust With Carbon Fiber End Cap

$409.00 - 449.00
5 out of 5 stars (18) reviews

FMF
Factory 4.1 Slip-On Exhaust

$359.99 - 404.99
Sale
Up to 10%
4.5 out of 5 stars (14) reviews

FMF
Factory 4.1 RCT Slip-On Exhaust - Dual

$629.99 - 899.99
Sale
Up to 10%
5 out of 5 stars (10) reviews

Yoshimura
RS-4 Slip-On Exhaust

$359.00 - 589.00
Clearance
Up to 5%
5 out of 5 stars (6) reviews
Video Available

FMF
Q4 Hex Spark Arrestor Slip-On Exhaust With Side Panel

$350.99 - 359.99
Sale
Up to 10%
5 out of 5 stars (1) review

FMF
Factory 4.1 Slip On Exhaust - Mini

$224.99 - 269.99
Sale
Up to 10%
3 out of 5 stars (1) review

FMF
Powercore 4 HEX Slip-On Exhaust

$314.99 - 404.99
Sale
Up to 10%
5 out of 5 stars (38) reviews

FMF
Q4 Spark Arrestor Slip-On Exhaust

$287.99 - 350.99
Sale
Up to 10%
4.5 out of 5 stars (40) reviews

FMF
Q4 Hex Spark Arrestor Slip-On Exhaust

$341.99 - 431.99
Sale
Up to 10%
4.5 out of 5 stars (25) reviews

Pro Circuit
T-4 Slip-On Exhaust

$297.99 - 440.99
Sale
Up to 10%
4.5 out of 5 stars (18) reviews

Leo Vince
X3 Enduro Slip-On Exhaust

$451.95 - 524.95
5 out of 5 stars (2) reviews

Akrapovic
Slip-On Line Exhaust

$649.95 - 827.95
5 out of 5 stars (1) review

Pro Circuit
T-6 Slip-on Exhaust - Dual

$707.99 - 708.99
Sale
Up to 10%

KTM PowerParts
FMF Slip-On Silencer

$349.99
4.5 out of 5 stars (2) reviews

FMF
Powercore 4 HEX Slip-On Exhaust With Side Panel

$305.99 - 341.99
Clearance
Up to 10%
5 out of 5 stars (2) reviews

KTM PowerParts
Akrapovic Factory Silencer

$599.99 - 649.99
Sale
Up to 10%
5 out of 5 stars (1) review

Dr. D
NS-4 Slip-On Exhaust

$277.77 - 824.99
Clearance
Up to 30%
4.5 out of 5 stars (9) reviews

Two Brothers
M-7 Slip-On Exhaust

$310.23 - 494.98
Sale
Up to 15%
4.5 out of 5 stars (16) reviews

FMF
Factory 4.1 Titanium Slip-On RCT - Natural

$562.49
Sale
Save 10%
5 out of 5 stars (2) reviews

Two Brothers
S1R Slip-On Exhaust

$424.98 - 650.23
Sale
Up to 15%
5 out of 5 stars (5) reviews

Two Brothers
S1R Black Series Slip-On Exhaust

$390.98 - 611.98
Sale
Up to 15%
5 out of 5 stars (3) reviews
Video Available

Pro Circuit
TI-4 Slip-On Exhaust

$449.99 - 520.99
Sale
Up to 10%
5 out of 5 stars (2) reviews

GYTR
FMF Factory 4.1 Titanium Slip-on Exhaust

$449.99
5 out of 5 stars (1) review

Pro Circuit
T-5 Slip-On Exhaust

$440.99
Sale
Save 10%
4 out of 5 stars (2) reviews

FMF
Q4 Spark Arrestor Slip-On Exhaust - Single Pipe

$341.99
Sale
Save 10%
5 out of 5 stars (1) review

FMF
Powerbomb Header - Stainless Steel - Motocross

$188.99
Sale
Save 10%
4.5 out of 5 stars (17) reviews

FMF
Megabomb Header - Stainless Steel

$247.49 - 427.49
Sale
Up to 10%
4.5 out of 5 stars (32) reviews

FMF
Megabomb Header - Titanium

$269.99 - 472.49
Sale
Up to 10%
4.5 out of 5 stars (37) reviews

Most Recent Dirt Bike 4-Stroke Exhausts Reviews

FMF HEX Q4 Quiet Core Spark Arrestor Insert

FMF HEX Q4 Quiet Core Spark Arrestor Insert

Derek - Michigan
2 out of 5 stars
Got stuck in my PC4 Hex "I waited for almost 4 months to get this quiet insert. It finally came back in stock. When I went to instal it, The insert would slip half way in and get stuck. A tap with my palm was enough to wedge it in there so I couldn’t fully instal it or remove it... I ended up riding with it for about an hour. It IS a lot quieter than the bare PC4 Hex but either my pipe ID is under sized or this insert is oversized. For that, I give 2 stars as this insert was the reason I bought the PC4 in the first place. I even called FMF before I bought the insert to ensure I was ordering the right part number."
See all reviews for this product
FMF Factory 4.1 RCT Full Exhaust System

FMF Factory 4.1 RCT Full Exhaust System

Alex879 - NORTH CAROLINA
5 out of 5 stars
FMF 2011 KX250F "this has been amazing... noticed a performance difference with the bike. Sounds even better than stock does and fit perfect. Highly recommend"
See all reviews for this product