Dirt Bike 4-Stroke Mufflers
Upgrade to 4-stroke mufflers engineered for maximum efficiency and sound control. These high-performance components enhance power delivery while delivering a smoother, quieter ride. Perfect for competitive racing or casual trail rides, our dirt bike 4-stroke mufflers ensure top-tier performance with lasting durability.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
Pro Circuit T-4 Slip-On Silencer 2003 KTM 525 SX 4T00400
PRO CIRCUIT
MSRP: $523.95Now: $471.56Was: $523.95Stock silencers rob your 525 SX of its potential—the Pro Circuit T-4 slip-on delivers measurable horsepower and torque gains across the entire power band, transforming throttle response and...4T00400- SKU:
- 4T00400
- Availability:
- Ships Same Business Day
- Weight:
- 4.50 LBS
- PRODUCT NAME:
- SILENCER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
- STYLE:
- ROUND
- FEATURES:
- WITH SPARK ARRESTOR
- MODEL:
- T-4
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MUFFLER COLOR/FINISH:
- POLISHED
MSRP: $523.95Now: $471.56Was: $523.95Qty in Cart: 0Quantity:Price:MSRP: $523.95Now: $471.56Was: $523.95Subtotal: -
On Sale
Pro Circuit T-4 Silencer Honda XR400R 1996-2004 4H00400
PRO CIRCUIT
MSRP: $523.95Now: $471.56Was: $523.95The Pro Circuit T-4 Silencer unlocks measurable gains in horsepower and torque across your XR400R's entire powerband while keeping weight to a minimum. If you're running stock exhaust, you're leaving...4H00400- SKU:
- 4H00400
- Availability:
- Ships Same Business Day
- Weight:
- 5.13 LBS
MSRP: $523.95Now: $471.56Was: $523.95 -
On Sale
Pro Circuit T-4 Slip-On Exhaust Honda XR650L 1993-2024 4H85600
PRO CIRCUIT
MSRP: $523.95Now: $471.56Was: $523.95The Pro Circuit T-4 slip-on exhaust unlocks measurable horsepower and torque gains across your XR650L's entire power band, translating to quicker acceleration and more responsive throttle control on...4H85600- SKU:
- 4H85600
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
MSRP: $523.95Now: $471.56Was: $523.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer for Kawasaki KX250F 2017-2019 0121725A
PRO CIRCUIT
MSRP: $649.95Now: $584.96Was: $649.95If you're running a KX250F, stock exhaust is costing you power and throttle response. The Pro Circuit T-6 Slip-On Silencer delivers measurable performance gains through optimized flow dynamics while...18211783- SKU:
- 18211783
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- T-6
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- SILENCER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
MSRP: $649.95Now: $584.96Was: $649.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer KTM 350 SX-F 2016-2018 0151635A
PRO CIRCUIT
MSRP: $649.95Now: $584.96Was: $649.95If you're running a 350 SX-F and want measurable gains in throttle response and mid-range power, a quality slip-on silencer is one of the most cost-effective upgrades available. The Pro Circuit T-6...18211729- SKU:
- 18211729
- Availability:
- Ships Same Business Day
- Weight:
- 8.60 LBS
- PRODUCT NAME:
- SILENCER
- MODEL:
- T-6
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
MSRP: $649.95Now: $584.96Was: $649.95Qty in Cart: 0Quantity:Price:MSRP: $649.95Now: $584.96Was: $649.95Subtotal: -
On Sale
Pro Circuit T-6 Muffler for 2018 KTM 450SXF 0151545A
PRO CIRCUIT
MSRP: $649.95Now: $584.96Was: $649.95The Pro Circuit T-6 Muffler delivers measurable power gains and a refined exhaust note for your 2018 KTM 450SXF while maintaining the reliability you need in competition or trail conditions. This...18211699- SKU:
- 18211699
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
- MODEL:
- T-6
- PRODUCT NAME:
- SILENCER
- UNITS:
- EACH
MSRP: $649.95Now: $584.96Was: $649.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer for Yamaha YZ450F 2018-2019 0131845A
PRO CIRCUIT
MSRP: $799.95Now: $719.96Was: $799.95The Pro Circuit T-6 slip-on silencer delivers measurable gains in exhaust scavenging and mid-range power for your YZ450F while maintaining stock headpipe compatibility—no custom fabrication required...18211841- SKU:
- 18211841
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- T-6
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- SILENCER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
MSRP: $799.95Now: $719.96Was: $799.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer Yamaha YZ250F 2019-2025 0131925A
PRO CIRCUIT
MSRP: $799.95Now: $719.96Was: $799.95The Pro Circuit T-6 slip-on silencer delivers measurable gains in power and throttle response while keeping weight to a minimum—critical for YZ250F riders who demand performance without compromise...18211893- SKU:
- 18211893
- Availability:
- Ships Same Business Day
- Weight:
- 11.60 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- SILENCER
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- T-6
- UNITS:
- EACH
MSRP: $799.95Now: $719.96Was: $799.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer KTM 450 SX-F 2019-2022 0151845A
PRO CIRCUIT
MSRP: $649.95Now: $584.96Was: $649.95The Pro Circuit T-6 slip-on silencer delivers measurable gains in power and throttle response while significantly reducing backpressure—a direct result of its asymmetrical design and optimized...18211878- SKU:
- 18211878
- Availability:
- Ships Same Business Day
- Weight:
- 9.20 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- PRODUCT NAME:
- SILENCER
- UNITS:
- EACH
- MODEL:
- T-6
MSRP: $649.95Now: $584.96Was: $649.95Qty in Cart: 0Quantity:Price:MSRP: $649.95Now: $584.96Was: $649.95Subtotal: -
On Sale
Pro Circuit T-6 Slip-On Exhaust Honda CRF250R 2018-2019 0111825A2
PRO CIRCUIT
MSRP: $1,045.95Now: $941.36Was: $1,045.95If you're running a CRF250R in competition or on the trail, your exhaust system directly impacts power delivery and throttle response. The Pro Circuit T-6 slip-on delivers measurable performance...18211860- SKU:
- 18211860
- Availability:
- Ships Same Business Day
- Weight:
- 17.40 LBS
- PRODUCT NAME:
- SILENCER
- MODEL:
- T-6
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
MSRP: $1,045.95Now: $941.36Was: $1,045.95 -
On Sale
Pro Circuit T-6 Slip-On Exhaust Kawasaki KX450F 2019-2022 0121945A
PRO CIRCUIT
MSRP: $799.95Now: $719.96Was: $799.95The Pro Circuit T-6 Slip-On delivers measurable gains in power delivery and throttle response while keeping weight minimal—critical advantages whether you're chasing lap times or tackling technical...18211891- SKU:
- 18211891
- Availability:
- Ships Same Business Day
- Weight:
- 10.20 LBS
- MODEL:
- T-6
- UNITS:
- EACH
- PRODUCT NAME:
- SILENCER
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
MSRP: $799.95Now: $719.96Was: $799.95 -
On Sale
Pro Circuit T-6 Slip-On Silencer Kawasaki KX250F 2021-2024 0122125A
PRO CIRCUIT
MSRP: $779.95Now: $701.96Was: $779.95The Pro Circuit T-6 slip-on silencer unlocks measurable performance gains on your KX250F while delivering the durability needed for both trail and competition use. A properly tuned exhaust system...18212030- SKU:
- 18212030
- Availability:
- Ships Same Business Day
- Weight:
- 9.90 LBS
- TYPE:
- SLIP-ON
- COLOR/FINISH:
- STAINLESS STEEL
- MODEL:
- T-6
- UNITS:
- EACH
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
MSRP: $779.95Now: $701.96Was: $779.95 -
FMF Factory 4.1 RCT Muffler - Aluminum 042290
FMF
$599.99If you're serious about extracting maximum power while reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band without compromise. The Resonance Chamber...18211391- SKU:
- 18211391
- Availability:
- Ships Same Business Day
- Weight:
- 8.83 LBS
- PIPE MATERIAL:
- STAINLESS STEEL
- END CAP MATERIAL:
- CARBON FIBER
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- UNITS:
- EACH
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF Factory 4.1 RCT Muffler - Aluminum 042291
FMF
$599.99If you're serious about extracting maximum power from your engine while reducing weight and minimizing crash vulnerability, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM...18211392- SKU:
- 18211392
- Availability:
- Ships Same Business Day
- Weight:
- 8.72 LBS
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- END CAP MATERIAL:
- CARBON FIBER
- UNITS:
- EACH
$599.99 -
FMF Factory 4.1 RCT Muffler - Aluminum 042292
FMF
$599.99If you're serious about extracting maximum performance from your bike while reducing weight and minimizing crash damage risk, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM...18211393- SKU:
- 18211393
- Availability:
- Ships Same Business Day
- Weight:
- 8.74 LBS
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- END CAP MATERIAL:
- CARBON FIBER
- UNITS:
- EACH
- MODEL:
- FACTORY 4.1 RCT
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF Q4 Muffler 043380
FMF
$499.99The FMF Q4 Muffler delivers the optimal balance of aggressive sound and real-world performance gains by reducing back pressure while maintaining street legality. If you're running a high-revving...18212045- SKU:
- 18212045
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- END CAP STYLE:
- SLASH-CUT
- PRODUCT NAME:
- MUFFLER
- MATERIAL:
- ALUMINUM
- MODEL:
- Q4 HEX
- RIDING STYLE:
- OFF-ROAD
- END CAP MATERIAL:
- STAINLESS STEEL
- TYPE:
- SLIP-ON
- UNITS:
- EACH
$499.99 -
FMF Factory 4.1 RCT Muffler - Aluminum 044464
FMF
$674.99If you're serious about extracting maximum power from your engine while reducing unsprung weight, the FMF Factory 4.1 RCT Muffler delivers measurable gains across the entire RPM range without...18212012- SKU:
- 18212012
- Availability:
- Ships Same Business Day
- Weight:
- 8.40 LBS
- END CAP MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- PRODUCT NAME:
- MUFFLER
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
$674.99 -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 044466
FMF
$799.99If you're serious about extracting maximum power from your machine while minimizing unsprung weight, the FMF Factory 4.1 RCT is engineered to deliver across the entire RPM band. Its shorter,...18212013- SKU:
- 18212013
- Availability:
- Ships Same Business Day
- Weight:
- 8.40 LBS
- END CAP MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- PIPE MATERIAL:
- TITANIUM
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- MUFFLER MATERIAL:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- MUFFLER
$799.99 -
FMF Factory 4.1 Muffler 042394
FMF
$599.99The FMF Factory 4.1 Muffler delivers a tuned exhaust note that doesn't sacrifice performance—optimized flow characteristics reduce backpressure while maintaining street-legal sound levels. Whether...18212035- SKU:
- 18212035
- Availability:
- Ships Same Business Day
- Weight:
- 7.68 LBS
- PRODUCT NAME:
- MUFFLER
- END CAP STYLE:
- CONICAL
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- MODEL:
- FACTORY 4.1 RCT
- RIDING STYLE:
- OFF-ROAD
- END CAP COLOR/FINISH:
- BLACK
- END CAP MATERIAL:
- CARBON FIBER
- MATERIAL:
- ALUMINUM
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF Factory 4.1 Muffler 042396
FMF
$749.99The FMF Factory 4.1 Muffler delivers the performance exhaust flow your engine demands while maintaining street-legal sound levels. This is the choice of professional racers and serious enthusiasts...18212036- SKU:
- 18212036
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- COLOR/FINISH:
- ANODIZED
- MODEL:
- FACTORY 4.1 RCT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- END CAP MATERIAL:
- CARBON FIBER
- END CAP STYLE:
- CONICAL
- PRODUCT NAME:
- MUFFLER
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
- END CAP COLOR/FINISH:
- SILVER
- MATERIAL:
- TITANIUM
$749.99Qty in Cart: 0Quantity:Price:$749.99Subtotal:
