hey i see some kind of screen in there, what is that?? i know its a different engine than mine but my DP dont have that screen. could this be because mine is just the offroad pipe with no cat??

 

I think it is part of the cat, my off road has no screen either.

 

oh you got the off-road too, ha how do you like the smell of the exhaust??

 

It smells great!!
Skip to 1:00
http://www.youtube.com/watch?v=JvdJZh1Jl60

 

Its part of the cat- if you have a catless off road pipe, then you would just have regular pipe in place of it.

 

is there any restriction with that screen??

 

EDITED My original post to include more pictures of the stock exhaust to the resonator.

The cat does restrict some, but it is for emissions purposes. Obviously a straight pipe will be more free flowing, but Cats are the law and I like to build my car to abide by those laws. Plus it is a high flow cat, so the restrictions are minimal (compared to the stock)

 

The other thing you've got to think about too wht02monte is how much is the cat really 'restricting'? Especially since most people on here just have basic bolt on's as far as power goes- even a stock cat isn't a huge deal- much less a high flow. Obviously no cat can flow as well as straight pipe- but on the cars that have a downpipe like I posted- getting rid of that other crap is the bulk of your restriction.

 

oh i understand. when i had my res and ubend delete i notice a decent increase, but then when i went with the offroad pipe i really didnt notice anything but sound. now i still have a question if you can bare with me here, so as you know i got a nice flowing exhaust, what will a new set of headers get me ? just sound or will i see some kind of increase in power??

 

No clue on the 3400's. I have no idea how bad the stock manifolds are, or how good the aftermarket headers you're looking for are.

Most cars see a decent power gain with headers because many factory designs have to compromise flow in some areas for one reason or another (production costs, easier production line install, etc).