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4-Stroke Exhaust Systems

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169 Results

Fastway
Replacement Spark Arrestor Screen

$14.95 - 14.99
5 out of 5 stars (1) review

Dr. D
Replacement Spark Arrestor

$16.95
5 out of 5 stars (4) reviews

Dr. D
NS-4 Spark Arrestor Kit

$16.95
4.5 out of 5 stars (2) reviews

Pro Circuit
Spark Arrestor Screen

$17.99
Sale
Save 10%
5 out of 5 stars (8) reviews

Yoshimura
Spark Arrestor

$19.95
4.5 out of 5 stars (7) reviews

Pro Circuit
Stainless Steel End Cap Insert

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

Pro Circuit
Modular Quiet Tip

$22.99
Sale
Save 8%
4 out of 5 stars (4) reviews

Yoshimura
TEC Insert

$24.95
4 out of 5 stars (1) review

FMF
Ti-4/Factory 4 Quiet Core Insert

$25.99
Sale
Save 7%
4 out of 5 stars (1) review

FMF
Factory 4.1 RCT Spark Arrestor Insert

$26.99
Sale
Save 10%
5 out of 5 stars (3) reviews

Pro Circuit
Stainless Steel Modular End Cap

$26.99
Sale
Save 10%
5 out of 5 stars (2) reviews

FMF
Factory 4.1 Spark Arrestor Insert

$26.99
Sale
Save 10%
5 out of 5 stars (6) reviews

FMF
Powercore 4 HEX Spark Arrestor Insert

$26.99
Sale
Save 10%
4 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

Yoshimura
Quiet Insert - RS-4

$28.45 - 28.95
Sale
Up to 5%
3 out of 5 stars (2) reviews

Yoshimura
Low Volume Insert For RS-4 Exhaust

$28.95
5 out of 5 stars (1) review
Video Available

Pro Circuit
Stainless Steel New End Cap

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

Yoshimura
Spark Arrestor Insert

$33.20 - 33.95
Sale
Up to 5%
4 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

FMF
HEX Q4 Quiet Core Spark Arrestor Insert

$35.99
Sale
Save 10%
3 out of 5 stars (2) reviews

Fastway
Ultra Silent Insert

$46.99
5 out of 5 stars (1) review

Dr. D
Quiet Core Insert

$54.95
5 out of 5 stars (1) review

Pro Circuit
Quiet Insert With Spark Arrestor

$57.99
Sale
Save 9%
4.5 out of 5 stars (5) reviews

Pro Circuit
Ti-5 Carbon End Cap

$89.99
Sale
Save 10%
5 out of 5 stars (1) review

Fastway
Spark Arrestor End Cap

$99.99 - 259.95
4 out of 5 stars (11) reviews

Pro Circuit
T-4 Head Pipe

$118.99 - 289.99
Clearance
Up to 30%
4.5 out of 5 stars (11) reviews

FMF
Powercore 4 Slip-On Exhaust - 4-Stroke

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

Dr. D
Head Pipe

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

FMF
Powerbomb Header - Stainless Steel

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

FMF
Powerbomb Header - Stainless Steel - Motocross

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

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

FMF
Powercore 4 Complete Race Exhaust Stainless Hi-Flo Header

$206.99 - 233.99
Sale
Up to 10%
5 out of 5 stars (62) reviews

FMF
Factory 4.1 Slip On Exhaust - Mini

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

Bill's Pipes
SA-4 Series Head Pipe

$230.00
5 out of 5 stars (1) review

FMF
Powercore 4 Complete Exhaust Stainless Hi-Flo Header

$233.99
Sale
Save 10%
5 out of 5 stars (12) reviews

Pro Circuit
T-4 Complete Exhaust System

$236.99 - 737.99
Sale
Up to 10%
5 out of 5 stars (56) reviews

Pro Circuit
Ti-4 Head Pipe

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

FMF
Megabomb Header - Stainless Steel

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

Pro Circuit
Ti-4R / GP Midpipe

$251.99
Sale
Save 10%

FMF
Megabomb Header - Titanium

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

FMF
Powerbomb Header - Titanium

$269.99 - 539.99
Clearance
Up to 10%
4.5 out of 5 stars (2) reviews

Dr. D
Complete Exhaust With Spark Arrestor

$274.95 - 637.95
4.5 out of 5 stars (23) reviews

Dr. D
NS-4 Slip-On Exhaust

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

FMF
Q4 Spark Arrestor Slip-On Exhaust

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

Pro Circuit
Ti-4R / GP Headpipe

$288.99
Sale
Save 10%

Pro Circuit
T-4 Slip-On Exhaust

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

KTM PowerParts
FMF Megabomb Plus Header

$299.99 - 399.99
5 out of 5 stars (1) review

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

Two Brothers
M-7 Slip-On Exhaust

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