This thread is honestly kinda funny but me and death are both speaking from a past experience on these exahusts. I went from stock, to stock without baffle, to DG full system, to my yoshimura slip on. The stock exhaust was a milkcrate, and not even a good strong metal one, it was a shitty plastic smashed milkcrate that i hated. Took the baffle out and noticed maybe a slight bit more torque nothing to brag about just sounded shittier than stock. The i finnally saved up 170 dollars of grass cutting money (this was before i had a job) and bought the DG full chrome system. The Dg was cheap, looked nice, and sounded alot better than stock. I ran it like that for a while even though i do have to say if anything it made my quad slower in a strait line, but torque was alot better. Then i popped the airbox lid off and rejetted that made a bigger diffrence than the exhaust alone. It was actually better than stock. Then the DG started to sound like crap(they use cheap ass packing, litteraly was nothing more than house insulation) I repacked it with silent sport and it made it sound a little better. Then i came to the desicion it was time to upgrade because of noise, and i just felt there was more horsepower with the stock header and a new slipon pipe. Plus the Dg was starting to worry me it was starting to rust on the brackets and they looked weak to begin with. Plus my friend on his 300ex blew his pipe(exact same thing) apart and also broke the mounting brackets. So i figured i sell it and get something new. I got my yoshimura, and as soon as i opened the box i could see the build quality was 100 times better honestly. The construction was more solid and also doesnt looked like you could break anything on it. Also all aluminum and stainless steel construction. The slip-on yosh weighed less than my Dg header almost. no more rust and this exhaust shines up like nothing, all you gotta do is hit it some rubbing alcohole like the instructions say. Plus teh biggest factor is tunability now when i want to ride state trails where DB's are restricted i can in less than 2 mins and i havent had top rejet because of changing endcaps either so thats also a plus.
On a scale of 1 to 10
Stock-1
Stock without baffle-2
Dg- 4 1/2
Yoshimura- 9 1/2
The only reason the yosh doesnt get a perfect 10 is i dont have the header yet, other than that there isnt a single thing i could complain about, other than dennis kirk slightly denting my endcap, but its not noticble unless you are really picky, i didnt think it was worth waiting a couple weeks to get a new one. But that has nothing to do with Yosh. The Dg plain and simple was a waste of my time, because it only wanted something better about a week after having it. If you want justice or a reason why a DG or cobra is better than a yosh, find a new yosh and a new cobra and put them side by side, or jsut pick them up and feel which is better, The yosh obvisouly feels like it is built like a 300 dollar pipe, the cobra on the other hand feels like its worth about 80-100 bucks. You get what you pay for in this world, and if you want soemthing that will last and keep coming back for more id spend the extra cash.