I totally get all the benefits, but I definitely fall into that category of not being willing to give up the sound over all of that. Exceptional video on explaining this in detail so clearly! Keep up the awesome work Tanner!

If you want to compare sound 3:37 (UEL) 4:55 (ELH)

This definitely taught me something about exhaust mods. I'm staying with the equal length headers on my FA 20 2017 WRX.

As much as I love the "Subie rumble" but when I got my STI with a twin scroll turbo, I was hella disappointed. But the way the boost comes on is way more smooth. With the Invidia exhaust I have (turbo back) the sound is pretty sweet and sounds like a rally car on a cold start. After the mods and a dyno tune, I am happy to sacrifice the "rumble" for a better drive. But I totally understand why one would want have UEL headers.

The experience of drive Subarus is the best using Unequal. Performance is important but is not all. Excellent video.

“Let’s Get Ready to Rumble!” You cannot beat to sound of the “Subie Rumble”.

Those that know exhaust and music, know that frequency reverberation, the kind that gives you goosebumps, is found in the design, material and length of the exhaust. Equal length with crossover after a high flow catalytic converter make perfect resonance.

I know what I have to do but I don't know if I have the strength to do it.

Loving your videos. I have an 09 Wrx, first subie, but I definitely appreciate someone that knows and loves what they talk about and is accurate with the info that is presented. I can tell you take a considerable amount of time out to do these videos. We all appreciate it brotha. Maybe us WA boys will cross paths someday. 😬🇺🇲

so glad this came on my recommendations lol! decision has been made! thank you for this absolutely perfect timing video! it was meant to be 😁

Mannnn 😭 I want power and reliability but the rumble is just so good ; but power is my goal...so I must switch over

Heck yeah bro! Representing WGU! Cool to see one of my favorite youtubers might be a "classmate" of mine.

Exactly why I went twin scroll, even exhaust pulses with the oem equal length headers. Makes a world of a difference.

UEL have rumble sound and have slight lesser bhp if you compared with equal one doesnt have rumble yet better gain. the difference in bhp gain is not really significantly much that one can live without it. so UEL is FTW!!!!

"Some cars never see failure" Yeah if you park it 😂

honestly the only reason id buy a scooby is for the sound, take that alway and there's a dozen cars id probably rather buy for the price range.

Still love the Subaru signature rumble sound over the ELH sound. ELH sounds like a Honda Civic D16 fart can.

Those uel sound clips are insane what tf

I asked my girlfriend to help me decide with this tough decision. I said it’s like if you lost your voice but you get to live longer. She replied with she would rather live life to the fullest then live longer. Subie rumble is the identity of the car and I will do whatever to mitigate the chances of increased temps for the sound! Such a hard decision but if you’re okay with sacrificing some noise then more power too you!

I’ve only had my ‘19 WRX a few months but figured it had UEL’s from the factory. Guess I really need to get underneath it and take a good look at what I have. Great video, I learned something about my car today.

Bro....that's exactly what I needed to know. Sold on Killer B equal headers!

I will never regret going with ELHs. Holy headers just everything sound so unique, and so much better. To those considering going ELH, this was my experience summed up. It's like jumping off cliff. Could you hate yourself for doing it knowing that if you don't like you just wasted a ton of money because you can't return them after they've been run? Sure. Will it be something that gets your giblets all hot, bothered when you hear it for the first time. Yes.

I just noticed you take youe subie to surgeline. Lol would you recommend them as a tuner? I just bought my first wrx and I'm looking into building a solid/reliable but still fun to pour the coals to her occasionally motor/transmission and your videos are extremely knowledgeable I feel like. Thank you

Keeping the stock ELHs on my FA20. Other than that I'm good with the mods I have now: Things to note: --Car is a 2015 Subaru WRX Premium 6-Speed manual --As of this writing the car has ~74K miles on it --Her name is Julie :) --From factory I got front and rear weathertech mats for a good price --From factory I got a STi short throw shifter --I've had multiple Blackstone lab results on my motor oil and it proves to hold up very well. I have been constantly using magnetic oil drain plugs for a while to catch any extra metal parts the filter doesn't get to/misses Motor Oil Used: --Motul 8100 X-Clean EFE 5W-30 Synthetic oil Front and Rear Diff fluid Used: --Motul Gear 300 Fully Synthetic Gearbox Oil - 75W90 Performance mods: --IAG TGV Delete --EGR delete (may be IAG but not sure. They all seem of similar quality anyway so doesn't seem to matter) --Invidia 2015+ WRX J-Pipe/Downpipe (High-flow CAT) coupled with Corsa Catback muffler. I believe it is 3" piping --IAG AOS street version --COBB intake --Perrin Pitch Stop --Perrin Pitch Stop Brace. Brace comes with new stainless steel clutch line replacing the stock hard steel line. Required bleeding the clutch line --Perrin Brake Master Cylinder Brace --Perrin solid brass shifter bushing --Cobb 3-Port Boost Control Solenoid --Process West top mounted Verticooler --SouthBend Clutch Stage 2 Daily. Stock flywheel. Was resurfaced. Clutch and fork were done by my Tuner along with a Walnut blasting at around 45K miles --Verus Clutch fork and ball --JR Tuned at PrimeMotoring on Dyno on 93 Octane --Premium Dimpled & Slotted Brake Rotors (#RB-47032) --Front Akebono ACT1078 ProACT Ultra-Premium Ceramic Brake Pad Set --Rear Akebono ACT1114 ProACT Ultra-Premium Ceramic Brake Pad Set --Bled brakes using Motul (2 Pack) 100950 100% Synthetic Brake Dot 5.1 Brake Fluid 1/2 Liter or 500 ml Non-Performance mods: --Mid range hornblasters. I have a stock Subaru fog light switch going to 40 amp relay from old fog light set for the compressor in trunk. Horns are in bumper. Hooked with a 3 way switch to go from stock horns to train horn. Looks pretty stealthy in the car. Pain to install (neatly) and get working. Horn is triggered by the stock steering wheel horn --BlackVue front and rear dashcams. Wiring routed neatly. Wired up to the cig plug in center console --Pioneer AVH-X5600 2-DIN head unit. Was essential since the stock head unit left MUCH to be desired. Sound quality increased immensely and left stereo this way. Only gripe I have is it lacks good noise cancelation when on a phone call but otherwise works great. Would love a quality Android head unit but keeping this one. The stock speakers sounded WAY better afterwards --All front headlights (high/low) changed over to LED from Subispeed. This was one of the first mods I did since the Stock bulbs were TERRIBLE. Blinkers left on stock bulbs because I could care less about that :) --Backup alarm that I can switch on and off. Reverse lights work whether I have the alarm enabled or not. Just for fun. Combined with the train horn you can reverse, have reverse alarm enabled, and tap horn twice to sound like a huge 18-wheeler is backing up or something like that :) --17" BBS wheels with all season Michellin Sports tires. Still have the stock wheels. May get set of summer and winters and switch them seasonally --Max 360 Escort radar detector. Wired neatly and tapped into switched cig lighter wiring Put the switch for it neatly in console --Interior lighting green from LEDGUYS --Red top battery Current issue with car: --No known issues thus far (knock on wood)

I hit boost faster with my Perrin ELH. Compared to the stock EJ headers, I can now hit 24 psi @ 2700 with no turbo porting. Cylinder temps are much more even (not lower, but even) all around as well. ELH in combination with a cylinder 4 cooling mod and Koyorad radiator will save your engine from grenading when it gets very hot in terms of IAT and ambient temp.

I'm keeping my rumble

I Have ELH on my Sti and even though it took the rumble away for the most part, it added power and it now sounds like an evo

el all day. spool temps pulses can go twin scroll

You're doing gods work out here bud. Great job.

Love the videos and excellent review as always. ELH all day.

Great videos as always man! I’m new to the channel since I bought my second STi back in March and I’ve learn a lot of what I know now from your content. Thanks for all you do and making the time to keep delivering great content!

Subarus are all about the sound. Period.

Thanks bro! I want to get a UEL header, I love that subie rubble,

This makes things easy for me since I've always preferred the EL sound to the UEL. Don't get me wrong, UEL grumble is INSANELY hot, but the EL just hit different, especially at higher revs.

I have been running equal length headers since I got the car with 45k miles. I have 154k and had to get a new turbo but the compression test was perfect. So I think it protects the engine maybe.

Killer B ftw, love their products that help Subie owners fix some of the issues/flaws of these cars.

Gotta say the EL is cool, but I used to watch WRC and I've also been in love with that rumble since childhood. I will always rock UEL on my bugeye

Thanks for the information and have a good weekend.

I do love that subaru sound tho... 😅😅😅😅

I have an 08 STI - EJ257, stock VF48 single scroll turbo, stock UEL headers. I plan to get aftermarket headers and am deciding whether to go UEL or EL. I don't care about retaining or losing the boxer rumble. I just care about my torque curve going as high and wide as possible. I'm finding it difficult to get hard data on real world gains. Lots of anecdotal evidence, but not data. I often hear that EL headers are better for your engine because of lower EGTs because the runs are shorter. However, in the diagram in the video, the runs look longer in the EL compared to the UEL. Sure, with the UEL headers the runs from cylinders 2 & 4 are longer than for cylinders 1 & 3 so you would expect to see more problems with cylinders 2 or 4 before 1 or 3. But, for the EL headers the runs from EVERY cylinder look longer than the runs from cylinders 2 & 4 of UEL headers. So, by that argument EL headers will have higher EGTs and be worse for your engine than UEL headers for every cylinder! Did I misunderstand something here? Anyway, where's the data on this? Lots of stories of cylinder 4 going on the EJ257 doesn't prove anything about UEL headers being worse for engine longevity. It probably suggests that UEL headers are worse for cylinder 4 longevity compared to the other cylinders. FWIW, my tuner says that for my requirements of going for 300 kW atw for street and occasional track use, unequal length headers are the only way to go.

Great video brother, like many others get the benefits, but that sound is as addictive as the cars themselves, the EJ20 2.2 is still my fav sounding, top end for me isn’t really an issue in my cars, it’s more low to mid I am always wanting, more so I don’t have to floor it just to get that engine to sing, I am wanting more of that sound I am finding as things progress, that said I follow am following all your advice and tips on longevity and prevention where possible. You KillerB setup always sounded good when you swapped, but there is still that difference, you covered it well my man, comes down to what the heart wants or the ears in this case! Ya have to pay to play as they say 🤪👻

Does an EQUAL LENGTH HEADER require an engine Tune? Thanks 🙏🏽 for the video!!

Best video on this subject !

Seems like ELH is the way to go! Thanks Tanner. WooooooOOOOOOoooooooo!

Perfectly know what the deal is now about the headers I definitely love the rumble on the un equal length headers but I will never kill my wrx for the rumble with that being said I really appreciate you making this video so explanatory

Equal Length FTW!

Sold the blobeye wrx(got boring to me, didn’t like AWD). Picked up a frs. From my understanding with NA setups exhaust velocity should be consider vs exhaust back pressure because of lack of exhaust recycling(turbo), therefore linear power is there just like you stated with exhaust scavenging, but with wrx/sti back pressure is key to better linear power output. Bigger pipe diameter does gain more hp, but where it’s distributed is bias. Usually top end gains only. EL on the fa20 have shown to be superior all across the graph with tuning. Haven’t done research too deep into the EJs, but many seem to like running EL because the Subaru rumble is faint, but definitely still there and the power gain is also there to back it up. *EQUAL LENGTH IS MORE EFFICIENT, BETTER HP/TQ CURVE, AND SAFER*

Brother! I came back to the video I intermitted last time.. I was absent for a while 😅. So now, I'm going to catch up with your videos) Great and clear episode! Like as I always see it on your channel))

Got to have my Subaru rumble! lmao! Thanks, brother.

I have a 2015 wrx that I’m doing . I just ordered the plm equal length header with dual waste gates . I already have a high flow catted j-pipe , invidia r400 cat back , Perrin top mount intercooler , Perrin charge pipe , Cobb air intake, Perrin air oil separator, greedy boost controller, Aem wide band , I’m looking for 350 hp reliable as possible. Is there anything else that you would recommend I add?

I feel like those cylinders get hot because of the uel but also the 3rd cyl gets really hot because the turbo is right there, I feel like that was a poor design I’m going to do a front more to keep the longevity of the motor

180 headers on a boxer engine? ie Collect 1 and 4 equal length, collect 2 and 3 equal length then either send them out as dual or separated into each scroll of the turbo or collect them later separately? That would likely be most efficient, idk about packaging. Probably sound the best too.

Very helpful, thank you.

Yeah, I wish I had that rumble. But my wrx gets 32 mpg on the freeway . Take the good with the bad

Gotta love that UEL headers. You can hear it mile down.

Dorian is here great vid, keep it up #team smeedia

Unequal also promotes better spooling. Older Subarus should also be tuned when going to equal cause you're changing exhaust characteristics.

Bro I'm digging the drawing

Great content!

this is a great subject to cover. most people i feel arent educated what the differences are. the weaknesses the strengths. if i bought a new sti an aos and equal length headers would be my first mods. when i bought my 18 wrx over three years ago i thought the rumble was from the engine only to educate myself to find out its actually the exhaust. i was pretty disappointed. not only is from the exhaust buts its bad for the car. still though sti's still sound really good with equal length headers. much better than the fa motors.

Omg thank you so much bro now you made me decide to order my racing ulh for my 05 WRX xD

Very informative video! I've loved Subaru and Subie rumble for as long as I can remember and just this summer I purchased my dream car, an STI. I have big plans for it and of course I want it to be loud, I've been really off an on with ULH vs ELH my big thing I want my car to be unique and sound unique to me, I find ALL subies no matter the exhaust set up you run they all sounds the same, that beautiful Subie rumble. I wan't mine to sound unique and I've really been leaning towards ELH but then I feel not only am I sacrificing the classic rumble but I feel the car won't be as loud or sound as a aggressive.. Is there any specific headers set ups I could run to keep a loud aggressive sounding subie? I was thinking HKS or Tomei but idk, It's really hard to find any actual info on these things

Art is not what you do 🤣 but your exhaust header explanation was done very very well by you 👍👏. Me I want my FA to perform and to last, so equal length it is, I live in the present and not in the past. My FA may not rumble but I have got it to burble, pop and roar, with a Perrin stainless steel header ceramic coated that allows exhaust gases to exit and recirculate, faster and more. And for those who need rumble I say that’s perfectly okay to, but at some point sadly and likely to soon the engine repair bill will come due. (For those interested I got my headers “White Lightning” ceramic coated by Swain Tech. Great 👍 coating)

I guess you can't have your cake and eat it too. I want that subie rumble tho!

Does anyone have any feedback and opinions on the Killer B Holy 4-1 headers?

UEL ftw. I don't care about performance difference. Don't make your subaru sound like a mitsu with an EL.

I would really go for equal lenght, because I'm old and not for the sound. :D And I have equal in my Levorg.

I have a 16 WRX, so FA20. If i swapped to UEL's and swapped the turbo to a single scroll. Would that mitigate alot of the issues FA20s have with UEL's? Obviously EGT's are still an issue but scavenging shouldn't be anymore at that point.

Definitely a helpful video

Unequal length header better street drive will bring on the turbo on earlier. Equal will make more power top end good for drag setup.

I'm not into Subaru, so outside of the target audience, but I've never liked the pulsing sound of their UELHs. An exhaust that mimics the sound of a 4 cylinder with a dirty plug, isn't music to my ears. I'd definitely be fitting the Killer B ELHs if I had a Subaru. 👍

Aside from hp loss which I won’t care about, would it really be bad to run uel headers if I got an fa20 wrx? I plan on getting one and I can sacrifice things for uel’s also I heard but I’m not sure if it’s legit that with a proper dyno tune the power loss from uel’s is nearly non existent but my main concern would be to know genuinely how less reliable it could, or will make the fa20

What’s the absolute highest hp you could go before having to switch over to el? I would think that at some point in the quest for more power that the uel design would ultimately be just too inefficient and problematic. although I have heard of a few higher hp builds that still utilized uels. Just curious to see what your opinion is

Any insight on fuel economy of UEL vs EL on an EJ platform? I can’t seem to find anything covering it

Will you gain or lose power with ELH on a naturally aspirated engine?

What would change in terms of torque and power on a naturally aspirated engine, like the FA20 in the BRZ or any of the FB20 engines like in the impreza or crosstrek?

Just got a tomei equal length header today! 44mm tial waste gate grimmspeed up pipe torque solutions turbo inlet an ID 1050 injectors for 1,500$ love our subi family wooo

Than why did Subaru use UEL in the EJ?

T’was a fine drawing.

Would of been good to show the ELH vs UELH sound in the same carpark. A dyno doesn't give either justice

Any recommendations for going UEL? The second my warranty runs out I’m running it! Keeping it stock otherwise tho I just want that sound.

do the unequal length headers on really cause problems when adding significant mods? If that is the case, is it really worth giving up the subaru sound or just going a little lighter on the mods.

K I was just wondering why my built 257 block doesn't have that rumble and has elh thank you

I was so disappointed when I found out the FA20 comes with ELH and not UEL 😭😭 but I’m not gonna take that risk for UEL when I can just straight pipe it tbh 😂

hey smeedia i install the killer b header and now i am getting p0420, any idea how to remove that code ? everything seem running rights. i have 2019 sti

It's all about the UEL for me Tanna. Had my day's of street fun when I was younger. Time to teach these kid's real music lol. 🎧🎧🙏💯💯🤘🤘🤘. Enjoy your weekend Bro 🎶🎵🎶🎼🎶🎶

Hey sir. First of all, your contents are just amazing and very informative. Spot on! When I get a newer STI I pretty much have a lot of knowledge because of your channel sir. THANK YOU. Now, my question may sound stupid but I’m confident that you will know the answer, can I install an EWG on a stock turbo?

I like how all these cars still sound the same

I'll take performance over sound anyday! Thanks for the info!!....

Reliability is HUGE for me, so if I can spend ~$3k USD now on ELH, AOS, Bigger Radiator, etc, and save thousands more than I'm putting in because my engine goes out, it's worth it.

Do you even recommend getting EL headers over stock?

After switching to equal this is an unpopular Opinion but I hate the rumble now like it almost doesn’t sound healthy like equal is just so smooth and I couldn’t go back

Stone built subis best caveman invention ever.

Wow this was so beneficial! I love the sound, but I prefer longevity. I was thinking to go ELH with either the AWE Touring, Grimmspeed or the Delta from the sound clips I’ve seen. The Tomei seems to be loud, but a little too much drown and rasp. What would you recommend for a nice loud throaty setup when using ELH?

Thanks so much for the useful video! I am thinking to switch over to ELH. Does it require a computer tune afterwards if I am just using factory down pipe and a HKS cat back exhaust for now? FYI: I don’t have an accessport. Thank you and looking forward to your reply.

I have EJ204 NA engine on SG Facelift Forester streetcar . For NA engine which header is better for performance / fuel efficiency ? EL stock header or UEL header ?

Let's not forget what drew us to buying the Subaru especially WRX's and older Foresters and Legacy's, it's because of the Awesome Rumbling sound that they produce.. I'll stick with Unequal Headers.. Who's with me??

An after market UEL header would be better than the factory EL on an N/A though yeah?

2017 WRX STi: I plan on installing my coated elh possibly this weekend .. i dont have a tune map for them yet .. just running the cobb stage1+ right now .. do you think i will have issues running the elh untuned temporarily?

Does UEL headers make the car slower if it was to be compared to the same car / stock with no headers?