There is a full Yoshi exhaust for sale on here right now for $450.00 buy it ASAP... That's a really sweet price...
i do not think anyone has a exhaust that gains HP that is worth spending money on...unless you only want it to sound different...do some reading Polaris did a fine job with the exhaust system on the 900 not much to be had power wise only to your ears.......
No I didn't know it Mark and if you took the time to read the posts like # 2 & #4 you'd see I don't have a political post...
Where are those results posted? I was unable to find them and was also talking to Nate and specifically told that its the controller NOT the exhaust that helps on the newer models as there isnt much difference in the exhausts. As for the weight difference, really? If you are drag racing, that may play a factor, but from what the OP stated, not sure that a pound is going to make a difference. I will gladly eat crow if someone wants to show me proof that they increase HP without a controller of some sort, but as yet, no one can.
Since you 've already asked Nate I suggest you ask him about his dyno results he posted on the different mfg's mufflers and exhaust...
How about your expert opinion on whether or not a free flowing muffler will run cooler than the stock muffler... The weight is a plus too when you can get rid of it ...
Not an expert at all, just experienced and I did a lot of research on this particular subject. I agree 100% that a better flowing exhaust helps dissapate the heat, as well as keeping as much mud off of it does, which is what I said in another post. But again, the difference over the stock header (not the 08-10 50", but the other style) is not enough to justify $600+ IMO. The simple fact is that duals/aftermarket exhaust offer no gain in HP, very little difference in weight, and very little difference in heat dissapation on the newer style ehaust. Now, if we were talking about a 2008-2010 50" exhaust were is comes out of the engine almost immediately into a single exhaust, then I would agree that there would be a significant gain. However, I would then argue to do what I just did on my 09 and buy a used newer exhaust and swap them out and save yourself $500+.
Yes they did, but again, you did not read my posts. WITHOUT a controller! In both the threads you linked they specifically state that the gains are with an EFI controller. In the first thread, they say it isnt dialed in yet as they havent had a chance to mess with it. Look 2 posts up from where yours is and read what is quoted and what I said. The OP said nothing about modifying his intake or running a fuel controller. He specifically asked is the exhaust necessary. It is not, as pointed out in another thread to me, Polaris seemed to have gotten it right for the most part finally. If he wants to get the exhaust AND the controller, then yes, he will see some gains in HP. As you stated above, a modified intake, an exhaust, yada, yada, yada is why the other people have gains in HP. Well yeah, so will bolting on a turbo... Again, if someone wants to show me dyno runs with no controller on or any other mods, just an exhaust (and not a picture posted of a dyno sheet) and it shows a HP gain, I will glady say I am a dumass and dont know what I am talking about and appologize. However, I dont think it will happen, and if it does, will the increase in HP be worth $600+ to someone who isnt racing professionally?
Easy Trigger.... I just assumed installation of an exhaust system went hand in hand with a revised intake and fuel controller to compensate for the increase in exhausted air. White Knuckle Racing did also mention they gained 7hp with the exhaust only, but obviously, they're lying. So there you go OP, forget it, none of em work.
