Header Questions 2019

[gadgtfreek]

Currently, have MBRP Street Cat-Back with H pipe, the previous owner installed. I do not plan on FI, so I am trying to figure the exhaust from front to back that makes the most sense for power. I see American Racing is pretty popular on youtube, but Corsa has both headers and the rest of the exhaust.

Im at a bit of a loss vs long tube and short tube, high flow cats vs catless, etc... Not that I don't understand what they mean, but if you were going to build an exhaust from front to back, what would you do? Would also be dyno tuned by a local tuner after the installation of headers.

Personally, I was looking at the AR MTC5-18134300FSNC catless full system. Other part Im not sure about are 1 3/4x3 vs 1 7/8x3 sizing. TIA

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[Laztug]

If you are able to pass inspection with no issues, go catless.
1 3/4 is more than enough for a N/A vehicle.
ARH makes a great system, but keep in mind if you plan on going e85 you will have to angle your 02 sensors. *unless ARH made a revision.

ARH has an amazing exhaust note.


Kooks has 02 bungs that do not have to be angled. Last I saw they were offering stepped 1 3/4 to 1 7/8 stepped headers.

 

[gadgtfreek]

Thanks, what I needed. I won't be going E85, just not easy to get here, so sounds like the ARH 1 3/4 is what I need to look at.

Is a tune a must after headers? I was planning all in the same trip, but wasn't sure during my reading on the subject.

 

[IrishStallion]

Look into Kooks, LTH, and Stainless Works too.

 

[gadgtfreek]

Any benefit to re-running the whole exhaust from one brand? The MBRP is pretty nice, just wondering if I should grab the long tubes only and run with it.

 

[zworld]

Your car has factory headers, how much gain can you get for spending upwards of 2k?

 

[IrishStallion]

Your car has factory headers, how much gain can you get for spending upwards of 2k?

Some nice stepped long tubes would pick up 15-20 whp 25-30 wtq. You could just delete/hollow out your factory cats for less and gain about 65-75% of long tube gain.

 

[gadgtfreek]

Your car has factory headers, how much gain can you get for spending upwards of 2k?

Just looking into that. Some opinion of people spending the money already is that, if not going FI it may not be worth it. I don't plan on that or drag racing, just eeking what I can out. At this point, there may not be much left to do and I should spend the money on the audio upgrade in the plans lol. I do think I will at least swap to a Borla S Type or Atak cat back. Ive always owned Borla, and like the sound. These MBRP's are fun, but the drone is getting a tad annoying after a couple of months of ownership. I didn't put them on, so at least I am not throwing away money lol.

For the cost of the full ARH system I can change to Borla and upgrade the speakers and add a sub. Decisions decisions...

 

[zworld]

Well I guess what I'm getting at is 15 to 20n hp gains are not worth that much cash at least to me. And I can afford them.

 

[NGOT8R]

Do it! While you’re at it, tune the car for Flex and E85R too. Even if it’s not readily available, it will be nice to have all of the available power on tap with just the switch of a tune. You can stay on the 93 tune until you run across E85 fuel and want max power. Oh, did I mention the sound of LT headers alone is worth the money? There is just no mistaking a car with LTs.

 

[AZ18yote]

If you are able to pass inspection with no issues, go catless.
1 3/4 is more than enough for a N/A vehicle.
ARH makes a great system, but keep in mind if you plan on going e85 you will have to angle your 02 sensors. *unless ARH made a revision.

ARH has an amazing exhaust note.


Kooks has 02 bungs that do not have to be angled. Last I saw they were offering stepped 1 3/4 to 1 7/8 stepped headers.

I've been running e85 with ARH LTH around 2.5 years no issues and no re angling.

 

[K4fxd]

Long tubes will net a gain in HP under the curve. Are they worth the hassle and expense? Only you can answer that.

Shorty headers will lower your performance. The Ford engineers fought hard to keep these headers on the stock car. The tubes are designed to scavenge cylinders. None are better.

Personally unless I can get true equal length headers it is a waste of money. 300 to 400 would be a fair price point for the junk being sold as premium. The O2 sensors are at the wrong angle, on most, the collectors are not true merge, the tubes are 8 to 10 inches difference longest to shortest.

They will still outperform shorty headers. However a simple cat delete will give 75 to 80% of the unequal length long tubes.

Now don't get me started on the highway robbery of the cat delete pipes.

 

[NGOT8R]

I've been running e85 with ARH LTH around 2.5 years no issues and no re angling.

Have you been on the Flex or E85R tune for 2.5 years? My O2 sensors aren’t angled either and so far, so good, but I’m only on my 6th tank of E85.

 

[AZ18yote]

Have you been on the Flex or E85R tune for 2.5 years? My O2 sensors aren’t angled either and so far, so good, but I’m only on my 6th tank of E85.

I run flex full time due to the blends and availability here in Phx.

 

[Laztug]

Stick with the lund tune

I've been running e85 with ARH LTH around 2.5 years no issues and no re angling.

Mine lasted about two months. *ARH orx 1 7/8
Had the 02bungs relocated and no longer had issues.

OP, I just saw you wanted to go with a custom dyno tune.
Save yourself the headache and stick with lund. They have a LOT more experience w your setup than most shops.

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