Honda CRF450R Full Single Exhaust System for 2003-2008 Models

Barker's Exhaust

$ 659.00

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  • Up to 8 Horsepower gain
  • Significant weight reduction over stock system
  • Removable aluminum head shield
  • Increased over-rev is particularly useful in competition
  • Fits 450R 2003-2008 models
  • Available in brushed aluminum or black powder coat 
  • Optional Add-Ons: Quiet Core; Spark Arrestor; Ceramic Coating; Barker's Exhaust Complete Repack Kit


The Honda CRF450R is a serious threat on the track. With their mean 449 cc, single cylinder 4-stroke engine, incredible handling, and light-weight, durable design, taking down the competition never felt so good! Honda has certainly designed a spectacular motorcycle with their CRF450R, so it's easy to see why so many riders call this bad boy home on the race track.  

When you want to take your CRF450 up a notch, install a Barkers Full Single Exhaust System! A Barkers Full Single Exhaust System will increase overall performance by increasing horsepower and torque across the entire power-curve. Eliminate that sudden fall-off that occurs near redline with the stock exhaust system, when you install a Barkers Full Single Exhaust System. Not only does the Barker Full Single Exhaust System weigh less than the stock exhaust, it will deliver that deep, throaty sound you've been searching for! 

Here is our Dyno information, provided by Alex at LaBaron's Powersports LLC

These are the results for the 06 crf450r. These charts and jetting specs should be applicable to all CRF450r bikes from model year 2003-2008. Final results are as follows Green: stock pipe and jetting, Blue: Barkers exhaust with no QC and stock jetting, Red: barkers exhaust and dyno tuned jetting setup. Jetting recommendations are : 165 main jet (168 stock), 45 pilot jet (42 stock), stock needle in 5th position from top (4th stock), 100 pilot air bleed (stock), #55 leak jet (stock).

Did you look at the dyno? Did you see that unusual blip? That's from the Rekluse aftermarket clutch!

All of Barkers Exhaust Systems are hand-crafted right here in the USA from premium materials. While most other after-market exhausts are mass produced from automated assembly lines, Barker's Exhaust systems are hand-welded one-by-one by skilled craftsmen. The head pipe portion of the Full Single Exhaust System is 304 stainless steel that is Tig-welded with seam-reduced interior surfaces for smooth flow. The can is comprised of 6061-grade aircraft aluminum and comes standard in a brushed aluminum finish. For a more customized look, you may also choose to have your can powder-coated in a black or red finish. Further enhance the look of your new system by selecting which color Barker's tag you would like. Barker's tag color options include: black, blue, red or yellow. To harness your new system to your machine, a strap kit is included with your purchase.

At Barkers, we have an extreme amount of dedication and respect for the off-road lifestyle. And we understand that owning and maintaining a performance vehicle is no joke. That is why you can expect only the best in Barker's craftsmanship and design. All Barker’s exhaust systems carry a limited one-year warranty against defects in workmanship and/or materials. See Barkers Terms & Conditions.


Other options available for the Full Single Exhaust System for the Honda CRF450 machines are the Barkers Quiet Core Insert and Spark Arrestor. The Barkers Spark Arrestor will help to keep our trails safe by eliminating any flammable emissions from escaping the exhaust. The Barkers Quiet Core Insert is ideal when riding in those sound sensitive areas and will reduce sound by up 5 dB. Heck, with only a loss of .5 to 1.5 horsepower you might want to ride with them in all of the time.  

For serious riding, we highly recommend purchasing a fuel controller for your new system. A fuel controller will drastically improve the way your new exhaust system and Honda CRF450 performs. As your new system will require the added fuel flow, a fuel controller is essential for your CRF450 to perform at it’s best. For optimal results, your dealer or a skilled technician should program the fuel controller prior to installation. If you are interested in learning more about why you should purchase a fuel controller, please feel free to call us! We promise you will talk to a real person who knows all about it! 


We recommend that you monitor and check the packing in your muffler after every ride. The length and time your packing will last will vary depending on how and where you ride. When you first notice any sign of the packing depleting within the can, it's time for a repack. Packing will wear out slowly over time, starting at 100% packed. It is normal for an absorption style high-performance muffler to lose packing but once you lose more than about 10-15% of your packing it will deplete faster and faster since it can now move around in the can. It is imperative you do not allow the packing to deplete too far. If your muffler becomes very loud or you hear rattling around inside the can you have completely depleted the internal packing and should not ride the machine until the muffler is repacked with a fresh pillow. Order new packing before you need it!

The Barker's Exhaust Complete Repack Kit is designed to make repacking your Barker's Exhaust Can simple.

Suggested add-ons: Quiet Core Insert; Spark Arrestor