Kia Forte Turbo Forum banner
1 - 20 of 60 Posts

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #1 ·
Alright so I have been back and forth on this since I have seen under the car. We have a second cat on the mid pipe right after the down pipe that I have been debating if I should gut it. Since I am in cali it has to visually be there for smog. So I was thinking of gutting it so when it comes time to smog it looks like it is there.

So would any of you gut it out? Would there be any performance gain from it? When I get a new exhaust I want to be able to unbolt the midpipe and put the stock one back on when need to be smogged.
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #5 ·
OK cool! I am going to do it today. I have to get under the car anyways for the oil change so I will pull the pipe off and chisel away and report back
 

·
Registered
Joined
·
1,037 Posts
Only problem I see is s peices going into the resonator and getting stuck in the baffles. Since you can only get to the cat one side you may have some trouble not doing that
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #7 ·
I am going to try and do it upside down by smacking a pipe into it. I have a air compressor and have a piece that I can attach that will give the full 150psi and I can push it all the way in and hopefully that will help get the crap out
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #8 ·
Pulled the mid pipe off and measured the inside diameter and it is just shy of 2.5" on my 5. All mandrel bent from factory to. Really nice to see they put the time into this
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #9 ·
Got the cat gutted. Was super simple. All the pieces came out easy. Got it back on and seems like it boosts sooner and is more responsive and less input from the throttle now to get it going.
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #11 ·
Yeah it must be. I have no code at all so far. Since we have a 2 piece downpipe the second o2 is on the one that has the flex pipe and is directly after the flange. I will update as I drive more and if it helped mpg to
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #14 ·
It is super easy. I thought it was going to be a pain. Just takes a deep socket and 4 bolts and 1 exhaust hanger to get the pipe off. Then I took my pry bar and a hammer and tapped it in breaking chunks off. Took about 20min to do. Also keep tilting the pipe up to drop the chunks out every few taps
 

·
Premium Member
Joined
·
3,021 Posts
Discussion Starter · #15 ·
It is actually like 2.4 all the way back and it's all mandrel bent to. Super nice for stock. So going 3" will help a lot along with getting the suitcase muffler off
 

·
Registered
Joined
·
1,067 Posts
is it easy to hit out the cat stuff?
 

·
Registered
Joined
·
439 Posts
I've done one before too.. it is pretty easy.... break it up then shake out and repeat. Took me around 20 min or so on another car I did this too.... did it change exhaust tone at all?
 
1 - 20 of 60 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top