There was once a dirt bike rider named B. Willy. He had been riding about 3 years or so and had a 2013 KTM 450EXC, which went pretty well and he would have epic battles for 1st with his mates on the trails. He had a little bit of bling on the bike such as steg pegs, a steering damper, unbreakable levers, graphics kit, an orange chain blah blah blah. As a bonus he thought he's chuck on an aftermarket exhaust. The most reasonably priced on ebay was a DEP full system so he bought it. It didn't fit his bike properly so he took it into work and fitted it up. When he rode the bike for the first time, he realised not only did the thing not fit as well as OEM, but it didn't help him improve his C grade speed, costed reasonable money and made his bike sound like a wet fart. So he took off the fart cannon and is now very interested in respringing his forks and having valving done, probably for around the same $$$ as the pipe. The end.