Shorty vs. Long Tube Headers

[Murdered Out Pony]

If you change the headers and remove the cats will it trip your check engine light?
If so, is there a way to turn it off?

Also, if you do headers and exhaust do you have to tune the car?

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[Grimace427]

If you change the headers and remove the cats will it trip your check engine light?
If so, is there a way to turn it off?

Also, if you do headers and exhaust do you have to tune the car?

Yes.
Tune.
It is a very good idea.

 

[1320']

Speaking of headers...

The FRPP .99 Video showed ARH Cobra Jet headers on their N/A 5.0 car, so we know headers for these things exist..

If so, anyone hear any whispers of when?

 

[Grimace427]

Speaking of headers...

The FRPP .99 Video showed ARH Cobra Jet headers on their N/A 5.0 car, so we know headers for these things exist..

If so, anyone hear any whispers of when?

There's a chance they simply used their '11-14 headers. If that were the case they probably fit well enough to work on a prototype but not enough to sell for 2015-specific models.

 

[1320']

There's a chance they simply used their '11-14 headers. If that were the case they probably fit well enough to work on a prototype but not enough to sell for 2015-specific models.

Kind of what I was thinking too. I know either Kooks or ARH 1 3/4's are going on mine when I get it.

 

[Nick@JDM]

Kind of what I was thinking too. I know either Kooks or ARH 1 3/4's are going on mine when I get it.

Check it out: http://www.mustang6g.com/forums/showthread.php/2015-mustang-gt-5375.html

2015 Mustang GT Kooks Long-Tube Headers and 2015 Mustang GT Kooks Full Exhaust are here!

 

[souprmage]

Interesting, the combo price looks pretty good too!

I see it has a 'green' option for states with OBDII testing, which Oregon does (at least where I live). Now I have to figure out what that means for the other MFGs and what they offer because I don't see that option for the SW exhaust.

Is it a special CC that takes performance away?

 

[Grimace427]

Interesting, the combo price looks pretty good too!

I see it has a 'green' option for states with OBDII testing, which Oregon does (at least where I live). Now I have to figure out what that means for the other MFGs and what they offer because I don't see that option for the SW exhaust.

Is it a special CC that takes performance away?

Generally there are two types of cats, ceramic and metallic. OEM's use 3-way ceramic cats with platinum, palladium, and rubidium to scrub the harmful elements from combustion. Metallic cats, aka race cats, basically offer an extra hot surface to initiate some chemical changes in the exhaust but in reality they don't do much.

I don't have specific info on Kook's green cats but I bet they are a 200-cell ceramic cat that operate in a similar fashion to OEM but have fewer cells to restrict flow and allow the engine to breath a bit better at the cost of some catalytic efficiency.

 

[Five Oh Brian]

I have had two 5.0's . Headers don't have the same benefit on the 5.0. as they used too. I made 700+ hp on the stock manifolds with cat deletes. They do add some hp but are honestly one of the last mods I would do especially for the price they get. Same goes for cold air kits. They are pricey for the return you get.

Agreed! I've owned a couple of S197 5.0's, as well. I found that an off-road H-pipe and tuning to match works wonders in these cars. That is the only power mod I've done to my '14 GT and I trap over 117 mph in the 1/4 mile. Would LT headers add some power? Yes, a little, but the cost per horsepower is terribly expensive.

 

[souprmage]

Generally there are two types of cats, ceramic and metallic. OEM's use 3-way ceramic cats with platinum, palladium, and rubidium to scrub the harmful elements from combustion. Metallic cats, aka race cats, basically offer an extra hot surface to initiate some chemical changes in the exhaust but in reality they don't do much.

I don't have specific info on Kook's green cats but I bet they are a 200-cell ceramic cat that operate in a similar fashion to OEM but have fewer cells to restrict flow and allow the engine to breath a bit better at the cost of some catalytic efficiency.

Excellent info, thanks Grimace!

 

[beefcake]

the one and only reason to use the shorties is if you want to maintain the factory cats for emissions purposes, they take as much time and labor to install,

even then, I would opt for a set of long tubes with high flow cats.

in addition to the HP gains, you have the sound that comes with the long tubes as well!

 

[GrabberBlue5.0]

in addition to the HP gains, you have the sound that comes with the long tubes as well!

^ this! I bought stainless power long tubes and spent 13 hours in my garage under my car on jack stands installing my long tubes and I would absolutely do it again for the 7 hp and the heavenly sound I got

 

[Melekith]

Seems as good a place as any to post up this question...

If I installed catless headers, am I ok to drive the car for awhile on the stock tune...say like one or two months? I totally get that I'll have a CEL, but I'm not worried about that. I will add a tune later down the line to rid the CEL and maximize the performance gains, but is there any harm in driving around on the stock tune? I'm interested in making my exhaust louder, right away, before installing the rest of my bolt-ons and then going custom tune. But I don't have unlimited funds to spend so I'm picking up mods when I can.

Or is the better/safer option just to tune first (if I can only do one at a time)?

 

[Grimace427]

Seems as good a place as any to post up this question...

If I installed catless headers, am I ok to drive the car for awhile on the stock tune...say like one or two months? I totally get that I'll have a CEL, but I'm not worried about that. I will add a tune later down the line to rid the CEL and maximize the performance gains, but is there any harm in driving around on the stock tune? I'm interested in making my exhaust louder, right away, before installing the rest of my bolt-ons and then going custom tune. But I don't have unlimited funds to spend so I'm picking up mods when I can.

Or is the better/safer option just to tune first (if I can only do one at a time)?

It won't damage anything, but I would wait for the tune. There is a chance you will run into a stalling issue due to the O2 sensor location change.

 

[beefcake]

on these cars, 0 reasons to put a shorty on, the 11-14's they were good to get keep the cats if you wanted

on this car, the cats are built into one of the headers, don't waste your time

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