Well everyone, there are some pretty cool changes coming our way for 2015. A lot of it has to do with the new muffler end caps and pressure relief tubes, that we now have from a place called "PowerQuietPipes".  A friend of mine named Tom ended up retiring and with nothing to do kept working on his ktm pipes and ended up coming up with this cool stuff.  Since I always said that BestDualSportBikes would only sell what was the best, we now only sell their stuff.

This is the Big Bottom Exhaust kit, above.  For a bundle price of $350, you get the world's greatest end cap to make the stock muffler work and sound awesome, the pressure relief chamber, which clamps on to your stock head pipe to lower sound and the GRUNT exhaust manifold (black piece) to replace your stock manifold for better response bottom to top. 

All together, it's all you need to get the performance you want out of your exhaust, at a nice, quiet sound, for less than the price of just a slip on muffler.

Add To Cart

Then you just need our TPS tuner here, so you can accurately increase the output voltage of your throttle position sensor (tps) by being able to put exactly 5.00 volts into it. You don't need any different ecu programs or piggyback tuners. Keep your stock EXC or XCF-W program and increase power and response to your liking by cranking up the tps. Go to the TPS tuning page under "the products" to learn more.

Let's watch it all work together now.  Watch the videos below to see how just the $350 Big Bottom exhaust kit and $90 tuner transform the 500 EXC and XCF-W into a third gear wheelie machine.

First the 500 EXC

Now the 500 XCF-W


And now the kit and tuner, with using the stock 500 ECU map.  Notice the 2nd gear wheelies are instant now and it's now doing third gear wheelies. Still quiet, spark arrested, has turn down to not burn EXC turn signals and only $440 total

You can read more about it and see installation instruction vids on your bikes page.

All the parts are available separately and fit 2011-15 350,450 and 500 EXC's and XCF-W's



The "Dead End" anti- vibration inserts, were reviewed in the 2014 October issue of Dirt Bike magazine and this is what they said. " Through the mystery of harmonic frequencies distribution, the dead ends are pure magic. We bolted our set to a KTM 300 and could tell the difference the second the motor snapped to life. The higher the rpm climbed, the better the dead ends seemed to work"

On another note, the ones they tested have long been replaced by better ones, which don't make for slippery ends and can easily be used with wrap around hand guards.  Buy as a kit (below) or separate. Go to the dead ends page under "The Products" for more pics and info

Dead End complete kit

Includes all you need. Thread inns, steel/lead weights and the tap

Add To Cart


The "Big Oily" clutch covers are a hit. Holding 25% more oil and made of billet, so you can't put a hole through it with a rock, it's extra protection and insurance for that $13,000 bike.

You can read more about it under "The products" and buy under "Products to purchase"

Fits 2011-2015  350,450 and 500 EXC, XCF-W ,XCF and SX