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Old 02-18-2020, 06:57 AM   #1
Jrae2424
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Default Unequal stock vs Unequal aftermarket headers

Is there anything to gain from aftermarket UL headers vs stock.
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Last edited by Jrae2424; 02-18-2020 at 08:41 AM.
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Old 02-18-2020, 07:22 PM   #2
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A little bit but not as much as going to a straight 4-1 EL header, more bang for the buck
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Old 02-18-2020, 08:31 PM   #3
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Hmm, I like the rumble, but I also like efficiency. A few more week until the tax return comes in. Hopefully I can make a choice by then. What would you do?
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Old 02-18-2020, 09:01 PM   #4
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Not unless you plan on making a crapton of power, and if that were the case I'd go equal. The unequal oems are pretty capable, "upgrading" to an aftermarket uel header will just give you larger piping diameter which will require a lot more turbo to fill and contribute to lag. I'd wager aftermarket uel headers are also more likely to crack and leak than oem. (Age factored in)
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Old 02-19-2020, 10:43 AM   #5
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Power wise you're going to gain an arguable amount. If you want the best bang-for-the-buck sticking with UEL, then just port the OEM manifolds or send them to a shop who does it. Again, you'll get arguable improvements, but you'll feel better knowing you've done what can be done to improve performance, and they will be FAR less likely to crack like aftermarket UEL headers are notorious for.

If you haven't heard an EL in person, I would recommend it. You don't loose the boxer rumble, but you do loose the sound of inefficiency. Far more performance benefits to going EL. With a decent design you will notice it when you start the car and blip the throttle the first time, and performance gains will be noticed, not be questionable.
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Old 02-19-2020, 12:11 PM   #6
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killer b all the way! it also helps with the cyl 4 heat issues!
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Old 02-22-2020, 08:40 AM   #7
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Stock (ported) or KillerBee. The only way to go. I've used other headers on previous cars and they've always resulted in some kind of leak.
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Old 02-22-2020, 10:03 AM   #8
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Quote:
Originally Posted by 2slofouru View Post
Not unless you plan on making a crapton of power, and if that were the case I'd go equal. The unequal oems are pretty capable, "upgrading" to an aftermarket uel header will just give you larger piping diameter which will require a lot more turbo to fill and contribute to lag. I'd wager aftermarket uel headers are also more likely to crack and leak than oem. (Age factored in)
So much truth to this. I pulled a set of UEL from my car and spent 2 days fixing cracks and holes on mine.

They still need some work but they are better than they were.
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Old 02-22-2020, 06:12 PM   #9
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HKS = is the way to go. best bang for your buck
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Old 02-22-2020, 10:41 PM   #10
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Quote:
Originally Posted by stu View Post
HKS = is the way to go. best bang for your buck
yup yup. been using this header for 4years. no leaks or cracks.

Last edited by Rickyh; 02-22-2020 at 10:41 PM. Reason: spelling
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Old 02-24-2020, 02:50 PM   #11
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yup yup. been using this header for 4years. no leaks or cracks.
You guys coat yours?
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Old 02-24-2020, 09:28 PM   #12
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no coating or wrap.
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Old 02-24-2020, 09:47 PM   #13
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Default Unequal stock vs Unequal aftermarket headers

Wrapped my tomei EL headers and spraying them with sealer this evening. Going in with a tomei turbo. The whole worrying about the rumble thing is silly to me, EL makes a more steady less constructed sounding rumble imo.
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Old 02-24-2020, 10:57 PM   #14
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what about OEM UEL with an upgraded cross pipe??? I assume the factory system is designed and sized for velocity to keep spool up, but is installing a larger cross pipe worth it ?
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Old 02-25-2020, 12:29 PM   #15
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I think i'll go with equal length. Worst case I can always go back.
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Old 02-25-2020, 01:01 PM   #16
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Quote:
Originally Posted by Jrae2424 View Post
I think i'll go with equal length. Worst case I can always go back.
Definitely more smiles per mile than UEL. A good setup you will notice gains immediately.
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Old 02-25-2020, 06:50 PM   #17
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what are you all using for the crossover pipe? How good is the stock collector relative to high quality replacement UEL?

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Old 02-25-2020, 07:39 PM   #18
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Quote:
Originally Posted by NighthawkSTI View Post
what are you all using for the crossover pipe? How good is the stock collector relative to high quality replacement UEL?
The crossover-pipe is more for replacing a failed OEM pipe I believe.

Factory collectors are cast, so they are going to be better than a fabricated collector as far as performance, and last longer.
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Old 02-26-2020, 12:20 PM   #19
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Actually just ordered the Tomei unequal length headers. I'll do a comparison video once there in.
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Old 02-26-2020, 01:29 PM   #20
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Actually just ordered the Tomei unequal length headers. I'll do a comparison video once there in.
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Old 02-26-2020, 01:39 PM   #21
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Quote:
Originally Posted by Jrae2424 View Post
Actually just ordered the Tomei unequal length headers. I'll do a comparison video once there in.
Literally talking and taking advice from the manufacturer of what I think is the best EL manifold on the market, but orders a Tomei
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Old 02-26-2020, 02:01 PM   #22
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All the JDM manifolds more-or-less just copy the OEM twinscroll manifold design. The Tomei manifold is no exception, but it is a well constructed manifold and worked well for me. If you're spending that much on a manifold, it's a little silly to not go EL. My main motivation for buying one was finding out the stock cast iron manifold wouldn't fit with the JDM oil cooler pipes.
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Old 02-27-2020, 06:51 AM   #23
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Quote:
Originally Posted by Homemade WRX View Post
Literally talking and taking advice from the manufacturer of what I think is the best EL manifold on the market, but orders a Tomei
Come on that's how they make money. If they offered to sell me the Holy B headers for $711 I'd probably change my mind. The discount could cover the cost of having it retuned and I'd even make a video showing the before and after sound and power gains. #SponsorheadersformeKillerB
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Old 02-27-2020, 12:04 PM   #24
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Quote:
Originally Posted by mrsaturn7085 View Post
All the JDM manifolds more-or-less just copy the OEM twinscroll manifold design. The Tomei manifold is no exception, but it is a well constructed manifold and worked well for me. If you're spending that much on a manifold, it's a little silly to not go EL. My main motivation for buying one was finding out the stock cast iron manifold wouldn't fit with the JDM oil cooler pipes.
This is why I run the JDM header. When I saw it I was impressed with how good it was in comparison to the cast stuff. Kind of like the older B18B1 cast manifold vs the B18C5 tubular stuff.

Quote:
Originally Posted by Jrae2424 View Post
Come on that's how they make money. If they offered to sell me the Holy B headers for $711 I'd probably change my mind. The discount could cover the cost of having it retuned and I'd even make a video showing the before and after sound and power gains. #SponsorheadersformeKillerB
Pretty sure a shop with plenty of cars available is not going to halve their price to someone to do something they could themselves, but quicker.
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Old 02-27-2020, 01:06 PM   #25
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Quote:
Originally Posted by mrsaturn7085 View Post
All the JDM manifolds more-or-less just copy the OEM twinscroll manifold design. The Tomei manifold is no exception, but it is a well constructed manifold and worked well for me. If you're spending that much on a manifold, it's a little silly to not go EL. My main motivation for buying one was finding out the stock cast iron manifold wouldn't fit with the JDM oil cooler pipes.
eh...performance unequal length that flow better than stock will increase horsepower so if that's the goal its not silly to stick with UEL, more power over stock and the aggressive rumble. Its a win win.

Too many people say that the UEL sound is the sound of inefficiency when in fact its actually the sound of power when done right.
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