I am looking to replacethe stock pipe on my '02 F4i. I have narrowed it down to these two
contenders. Anyone has pros and cons on these pipes? Is one louder than the other? Which
has better performance.

 

I've never head the 2bros but I have the Yosh and I love it. Its not loud at all at idle and sounds really good when you get on it.

Doesn't pop or burp when you roll off the throttle either. I like the looks of them as well.

Performance you're not going to notice any especially with just a slip on.

 

I have a yosh on my 1000rr as well a friend that has one on his R1, he has the tri oval, I also had the tri oval on an older R6.. . My wife has a two brothers on her zx6R. The main difference I can tell in the sound is the yosh will be raspier. I like it myself, but some do not. The two bothers seems to have a bit throater sound, but almost muffled. The yosh is louder as well.

Personally, I would get the Tri oval yosh. I like the sound and the looks of them. But thats only my preference.

 

2 Bros is deeper in my opinion which is how I like it and yosh I think is over priced if i had to pick between the 2 i would go with the 2bros but the thing is its up to the sound and look you want every1 in here is gonna say something different.

 

Yosh is louder ... 2Bros is a deeper rumble. I prefer rumble. Performance numbers are highly speculative and I don't trust any numbers but the ones I get off a dyno myself. Ya gotta think that they are similar though.

 

two brothers is louder, withouta doubt. i have a full yoshi on my 600. i rode with a guy that had a two bros on his 600. freakin loud!

 

I think 2 bros is louder also, not just in tone. Both good quality, performance will be the same.

 

I have the slip on yosh on my 06 600rr and sounds great. Even better when you are halling *** in low gears up to the higher gears and just wanting to make yourself herd.