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4-Stroke Exhaust Systems

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169 Results

FMF
Factory 4.1 Full System Exhaust - Mini

$359.99 - 404.99
Sale
Up to 10%

FMF
Powerbomb Header - Stainless Steel

$179.99 - 251.99
Sale
Up to 10%
4.5 out of 5 stars (76) reviews

FMF
Factory 4.1 Slip On Exhaust - Mini

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

Pro Circuit
T-6 Full-System Exhaust

$346.99 - 368.99
Sale
Up to 10%

Pro Circuit
Ti-6 Pro Complete Exhaust

$924.99 - 1118.21
Sale
Up to 10%
4.5 out of 5 stars (9) reviews

Pro Circuit
T-6 Complete Exhaust

$331.99 - 765.99
Sale
Up to 10%
5 out of 5 stars (8) reviews

Pro Circuit
Ti-6 Complete Exhaust

$899.99 - 1007.99
Sale
Up to 10%
5 out of 5 stars (4) 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-6 Complete Exhaust - Dual

$1189.99 - 1369.99
Sale
Up to 10%
5 out of 5 stars (3) reviews

Pro Circuit
T-6 Slip-on Exhaust - Dual

$707.99 - 708.99
Sale
Up to 10%

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

FMF
Factory 4.1 RCT Complete Exhaust With Titanium Megabomb

$629.99 - 1034.99
Sale
Up to 10%
4.5 out of 5 stars (11) 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
Megabomb Header With Mid Pipe - Titanium

$472.99 - 539.99
Clearance
Up to 10%
5 out of 5 stars (5) reviews

FMF
Powercore 4 HEX Slip-On Exhaust

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

FMF
Powercore 4 Slip-On Exhaust - 4-Stroke

$130.49 - 323.99
Sale
Up to 10%
5 out of 5 stars (155) reviews

GYTR
FMF Megabomb Titanium Head Pipe

$449.99 - 499.99
3 out of 5 stars (1) review

Pro Circuit
Ti-4 Head Pipe

$244.99 - 256.99
Sale
Up to 11%
5 out of 5 stars (1) review

Pro Circuit
Stainless Steel New End Cap

$31.99
Sale
Save 9%
5 out of 5 stars (2) reviews

Bill's Pipes
SA-4 Series Head Pipe

$230.00
5 out of 5 stars (1) review

Yoshimura
Spark Arrestor Insert

$33.20 - 33.95
Sale
Up to 5%
4 out of 5 stars (2) reviews

Bill's Pipes
RE 13 Series Slip-On Exhaust

$399.99
3 out of 5 stars (2) reviews

GYTR
FMF Megabomb Head Pipe

$349.99 - 379.99
5 out of 5 stars (1) review

Dr. D
NS-4 Spark Arrestor Kit

$16.95
4.5 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

Pro Circuit
Ti-4R / GP Headpipe

$288.99
Sale
Save 10%

FMF
Powerbomb Header With Mid Pipe

$314.99
Sale
Save 10%
5 out of 5 stars (4) reviews

FMF
Q4 Spark Arrestor Slip-On Exhaust - Single Pipe

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

Yoshimura
Quiet Insert - RS-2

$27.50 - 28.95
Clearance
Up to 5%
5 out of 5 stars (2) reviews

Dr. D
Head Pipe

$177.77 - 252.99
Clearance
Up to 30%
5 out of 5 stars (4) reviews

Pro Circuit
Ti-4R / GP Midpipe

$251.99
Sale
Save 10%

Pro Circuit
Stainless Steel End Cap Insert

$20.77 - 26.99
Clearance
Up to 31%
3 out of 5 stars (2) reviews

FMF
Factory 4.1 RCT Spark Arrestor Insert - Yamaha

$35.99
Sale
Save 10%
5 out of 5 stars (3) reviews

Yoshimura
TEC Insert

$24.95
4 out of 5 stars (1) review

FMF
Factory 4.1 RCT Full Exhaust System

$517.48 - 1079.98
Sale
Up to 10%
4.5 out of 5 stars (4) reviews

Yoshimura
RS-12 Full System Exhaust

$669.00 - 1139.00
Video Available

Yoshimura
RS-9T Slip-On Exhaust - Dual

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

FMF
Factory 4.1 Dual RCT Complete Exhaust With Titanium Megabomb

$1124.99 - 1349.99
Sale
Up to 10%
5 out of 5 stars (7) reviews

KTM PowerParts
FMF Factory 4.1 RCT Muffler

$649.99
5 out of 5 stars (1) review

FMF
Powercore 4 Complete Exhaust With Stainless Hi-Flo Header

$206.99 - 341.99
Sale
Up to 10%
5 out of 5 stars (39) reviews

Yoshimura
RS-9D Slip-On Exhaust - Dual

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

Yoshimura
RS-2 Comp Series Full System Exhaust

$339.00 - 699.00
Clearance
Up to 10%
5 out of 5 stars (47) reviews
Video Available

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