Installing Downpipes On My Nissan GT-R! *LOUD*

[@obrain75]

You should dyno it after the stage 3 tune. I’m curious how many extra horses you’re making!

[@BrosFOURRSpeed]

I need to find an AWD dyno! A bunch of RWD ones are near me. But I think I'm hours aways from an AWD one.

[@ANCIENTASTRONAUT]

did you have stock mid pipes in this video?

[@BrosFOURRSpeed]

Full Armytrix exhaust for this video. Downpipes were the last piece of the exhaust. Sounds amazing!

[@6598901]

How did you like the DP ? I just bought mine and i keep thinking about get DP but wonder maybe car will be more aggressive and hard to drive it

[@BrosFOURRSpeed]

It's no harder to drive. After I added the fuel injectors and new tune I could safely run this setup. Car is more powerful than before and sounds amazing! Having the valvetronic muffler keeps the car quiet enough when needed and then I can have it valve open for aweseom sound! Definitely recommend!

[@rcjones361]

How did you get the car up on the two post lift? The ones that I tried don’t fit the car’s jacking points. Did you just take off the pad and put it on the lift arm ?

[@BrosFOURRSpeed]

This one fit fine. The arms go to the jake points like normal. We had the pads in their lowest setting

[@roychehwane8821]

Hey man, Amazing video! I got the 2017 model and just decided to do some upgrades to have a louder car. I installed the armytrix cat-back exhaust (mid pipe - valvetronic muffler)... thinking of also changing the downpipes, what do you think? and should i do any additional modifications to have these changes running well?

[@BrosFOURRSpeed]

Absolutely do downpipes!! Amazing sound! You will need bigger fuel injectors and tuning tho. So get a Cobb accessport and 1050cc injectors and rock a stage 3 tune!

[@roychehwane8821]

Bros FOURR Speed Amazing!! Can’t wait to do so. Thanks

[@ceecamacho1427]

So wouldn't it make sense to just cut the existing down pipe with a saw as close as you can to the bolts. Once you do that you will have much more leverage and access to the bolts. I'm sure your not going to put the old down pipes back. Even if you had to buy used OEM down pipes it's still better than risking to break that bolt at the very top.

[@omarbadawi1458]

I got my downpipes but scared to bust a stud while installing. Should I soak them with WD40 overnight? And should I put back the OEM studs or get new ones? Mine has 18K miles on it.

[@BrosFOURRSpeed]

I used the OEM studs and havent had issues. Get some liquid penetrating oil and soak them for a good amount of time. I was nervous too but luckily they came off well

[@brentonaustin-r5f]

my Gtr is all stock it did come with i believe 3in intakes i recently bought a full boost logic 4in exhaust system and ams performance downpipes im going to be installing soon ima get a tune for it but do i have to get injectors as well?

[@BrosFOURRSpeed]

Yes you'll need a revised tune for the downpipes and fuel injectors

[@videomaniac108]

Without cats cleaning up the exhaust wouldn't the downstream O2 sensor read the same as the upstream one and therefore cause the ECU to read that as a non-functioning cat and thus throw a code?

[@coreydukes5725]

Well yes but a tune will remedy it.

[@BrosFOURRSpeed]

Technically. But these downpipes have a bung that just has a tiny hole in it. So the 2nd sensors only get the slightest amount of exhaust gas to them. Plus the tune will turn off cats anyways and adjust the computer to throw no codes. Car still passes inspection this was :) kzbin.info/www/bejne/qKO2mGNvfbmpnpI This vid I show a close look at how these armytrix pipes work. They don't call it Army 'trix' for nothing lol

[@vickeyjis]

I Have hks on my 14 gtr but i want to put downpipe...which one should i put and what size?

[@BrosFOURRSpeed]

I think all the downpipe options are about the same. It won't make any difference. But they should all be like 3in or 3.5in

[@MGS45]

So if you broke a stud.. what could you do about it? Asking for a friend 😅

[@BrosFOURRSpeed]

Oh boy.. Maybe drill it out? And then re three the hole if possible. Be delicate with it so you don't damage the turbo housing

[@amrofarouk8102]

Should I always replace the injectors if I install a catless down pipe on the GTR? Like is it a must? And what are the specifications of the injectors that should be installed in that case?

[@BrosFOURRSpeed]

It's not a must. However the proper tuning with downpipes will max out the stock injectors. So eventually you'll want to upgrade them. I didn't do them till I went Flex Fuel tho with bigger fuel pumps. So if you stick with 93 youll be good

[@amrofarouk8102]

@@BrosFOURRSpeed Thank you 🙏🏽

[@crazylordz]

I like how you are growing so much in this channel! Love your content man! Currently have a 370z and wanting to work my way up for the gtr next! I was thinking maybe a 13-14 year model

[@BrosFOURRSpeed]

Thanks! Yeah man just keep working towards your goal! It wall happen!

[@rickyloganjr.2362]

Hi Brian, until today I never heard of an armytrix exhaust, so I learned something. It was interesting to watch you and Mike work on it, but the fact you two knew what you were doing was incredible. Cars are certainly what you both know. I think I might now understand why it's called an armytrix exhaust. I did hear some difference in the sound of your GT-R. Alright so 7 days a week you upload a new video at 9am? Brian or Mike, can you please review a 2019 Subaru Forester in Limited or Touring trim level. Excellent vid Brian and Mike.

[@BrosFOURRSpeed]

Yeah Armytrix is the brand name. The best exhaust in the game! And being Valvetronic I can make the car loud or quiet with a press of a button. Everyday we have a video at 9am! We can try for a new Forester

[@CrapPCdamn]

How's the drone and smell? thinking of going catless on mine as well

[@BrosFOURRSpeed]

PeterD3 0 drone on the highway with valves closed. It’s amazing! I really only smell it when I’m backing out of my garage/driveway. And only a little bit at stop lights.

[@Artofspeedd]

Great video keep up the good work

[@BrosFOURRSpeed]

ArtOfSpeedd Thanks!

[@Chinooo___00]

Do you need a tune for downpipes?

[@BrosFOURRSpeed]

yes! kzbin.info/www/bejne/hHPWoKRqrq-kl8k Here s a vid when I then did the fuel injectors and updated tune for this.

[@simonlow5796]

May I ask this package are come with mid pipe or y pipe and mid pipe ?

[@BrosFOURRSpeed]

The downpipes you buy separate form the rest of the system

[@simonlow5796]

@@BrosFOURRSpeed I mean when you purchased full exhaust system with y pipe and mid pipe or only mid pipe . I search on armytrix website it come with 2 different packages.

[@simonlow5796]

I mean which package did you bought ? Y pipe with midpipe or just mid pipe package ?

[@ejazzakbar1244]

Can you use any GTR cobb access port?

[@BrosFOURRSpeed]

You just need the proper Access Port that is designed for you exact car. Mine is for a 2014 USA spec GTR. So you just need to order the right one. And work with a tuning company to get you better tunes then the off the shelve tunes. AAM Competition can hook you up with everything you need

[@traec1992]

Thanks for the vids guys! I own a 2016 Nismo with a few bolt-on mods (Z1 CAI, Z1 HFC, AAM short tails and UpRev Tune) and a 2013 Mazda 3 (my daily driver). Because of you I've slowly but surely been building up my garage tool set and started working on my own vehicles. Would you be able to let me know where you rented the bay for the day? I'm currently in the Huntersville, NC area. Also, have you already uploaded a vid showing a good starting set of tools every DIY should have? Thx

[@BrosFOURRSpeed]

This was Lake Norman Tire & Auto Center. We've never done a video on tools. A set of ratchet wrenches and sockets is a great start. Along with some screw drivers and pliers.

[@traec1992]

@@BrosFOURRSpeed Ok cool.. thx guys!

[@durwoodrobison7800]

Sounds great!

[@BrosFOURRSpeed]

Thanks!

[@kareztech]

Hello, I've just changed my downpipe as yours but my car has chack engine light and engine rpm is not stable! Do I need Tuning? And injectors? I just wanted louder gtr.

[@ondrejgahura5152]

you should have installed the o2 cel fix spacers, the ecu gets wrong information and tries to compensate it, thats why you got the check engine light

[@BrosFOURRSpeed]

Yes you need tuning. Deleting the cats without a tune isnt too safe for the turbos. Can risk over boosting. You should get 1050cc fuel injectors as well. Go to AAMcompetition.com and get fuel injectors and a Cobb Accessport. They can send you a stage 3 tune for you car and it'll run perfect. Give them a call!

[@davidnilles3117]

Good work guys!

[@BrosFOURRSpeed]

David Nilles Thanks!

[@garyalcorn3831]

I can’t for the life of me get these nuts unscrewed tried everything even heat seized solid any advice?

[@BrosFOURRSpeed]

Liquid penetrant is my only advice. Don't want to snap a stud. Then it's a major pain to figure out how to resolve that

[@garyalcorn3831]

@@BrosFOURRSpeed I know that would be worst case scenario I fitted the exhaust gaskets came with the down pipe should of fitted new Nissan oem ones there far superior now need to take back off is even more problematic than when I removed before

[@BrosFOURRSpeed]

@@garyalcorn3831 Oh dang. I just used the OEM ones on my car. Havent had an issue. Hopefully you get it squared away

[@garyalcorn3831]

@@BrosFOURRSpeed thanks mate 👍🏻

[@user-jt3nf7in5w]

Honestly after doing this on my garage floor this weekend - it almost seems easier on the floor than in the air

[@BrosFOURRSpeed]

Really? I've done everything on jack stands, I really wanted the leverage. Can't imagine doing this on the floor lol

[@user-jt3nf7in5w]

Bros FOURR Speed it’s done now lol don’t have to worry hopefully

[@kinggrimlock35]

I like ur GTR it’s nice n clean

[@BrosFOURRSpeed]

Thanks!

[@Andino.]

You should make a video about how much all that cost. Starting from the COBB accesport until now...

[@BrosFOURRSpeed]

Depends on the brands you go with. But tuner, downpipes, intakes, injectors and mipipe pretty much each cost $700

[@Andino.]

@@BrosFOURRSpeed is not that bad right?

[@BrosFOURRSpeed]

Dino Yeah for the price of the car, it’s really not anything crazy to get to full bolt ons like this

[@hpadrenaline]

I like how you do almost all upgrades on your own, respect! Don't you think it's worth going stage 4.25 (650-670hp)? You have most the upgrades ready for it

[@BrosFOURRSpeed]

HP Adrenaline Yeah I’ve done everything myself except the alignment! Anyone can throw money at others to do work for them. But it’s fun doing it ourselves! I think the car is fast enough now lol. Also, this is the end of the ‘cheap’ mods. Next steps are thousands and thousands of $ for bigger turbos, built trans and built engine. Once stage 3 is done, I’ll do some cosmetic stuff

[@hpadrenaline]

@@BrosFOURRSpeed I think that's the right approach if you have the time and ability, so what power are you looking at for stage 3? In UK standard you're looking at about 615hp, you now have the DPs which is one of the essentials for 4.25 here which will run over 650 HP with the required remap

[@BrosFOURRSpeed]

@@hpadrenaline I should be right around that 600whp mark on the 20psi map. That's enough power for me!tires break loose as it is lol

[@Grimacejuice]

Sounds great ! 👌🏼👌🏼

[@BrosFOURRSpeed]

Oh yeah!!

[@jedwardtong243]

Sounds amazing. Can't wait for the tuning. On a side note, how are you not frozen in the cold =O

[@BrosFOURRSpeed]

The bay had a larger heater in the ceiling!

[@ivanxu2935]

Where did you buy the down pipe ? Bro?

[@BrosFOURRSpeed]

From Armytrix directly!

[@Abodehajyhia]

It's with oem exhaust???

[@BrosFOURRSpeed]

Nope this already has the Armytrix exhaust! kzbin.info/www/bejne/b3jCdI2ridZ7f9U

[@harryurban4219]

That sounds great .

[@BrosFOURRSpeed]

Harry Urban Thanks! Wait till injectors and tune are in, then it’ll scream!

[@tontsyy]

looking forward to the injectors and tune, if i buy a gtr then this is exactly what id be doing!

[@BrosFOURRSpeed]

Tontsyy Sweet!

[@Executiveinvestments-]

Tontsyy Ur not buying a gtr.

[@CharlesWilliams-us6gs]

What was the cost of the project, including garage bay rental?

[@BrosFOURRSpeed]

Bay was $100. That was it! I've had the downpipes since last summer. So whatever downpipes you buy, add that cost. And then you'll need a tune and injectors to actually run the straight pipe exhaust. So add $700 tuner and $7 injectors to the bill.

[@Omgiamsotriggered]

@@BrosFOURRSpeed So less than 1000$? Thats actually sweet, a proper exhaust setup can sometimes cost up to 5000$.

[@billybong78]

Anyone in cali can you pass inspection with catless downpipe and oem catbacks?

[@BrosFOURRSpeed]

Probably not

[@coreydukes5725]

Oof my g was a pain in the ass with the demon bolts I can only imagine a gtr with broken studs 🙇🏻‍♂️

[@BrosFOURRSpeed]

If I broke a stud, the engine would have to come out! If that happened, I would literally put the car back to stock and sell it..lol

[@wyatttyler9068]

Link for downpipes?

[@BrosFOURRSpeed]

I just ordered them from Armytrix directly back when I got their exhaust.

[@thegonger1]

where is the electric ratchet| I find those come in very handy! ;-)

[@BrosFOURRSpeed]

thegonger1 That’d be pretty cool

[@RevToRedline]

Say bye bye to the blue tips on the inside I got those installed a month ago and the blue has all but faded away =/ Worth it for the sound though! 😈

[@BrosFOURRSpeed]

So far so good. Maybe I'll get them ceramic coated if that is even possible

[@svenstraessle6127]

Any chance you would sell me those OEM downpipes?

[@BrosFOURRSpeed]

Not interested in selling them. When the time comes to sell the car, everything will be put to stock

[@evobudbrink]

I can’t believe that fire extinguisher 🧯 got a mention smh

[@theodosiskokkinovasilis9173]

Drag race: nissan gtr vs audi r8

[@dannzx]

congratulations on getting them cats out with that basic tool kit 🔧👍

[@BrosFOURRSpeed]

Yeah it wasn't really too bad. Just took some planning out with all the extensions and the right leverage

[@JCtherocks]

Start looking into trans rebuild. You’ll need it, trust me

[@BrosFOURRSpeed]

JCtherocks The 2014+ trans is fine for a full bolt on set up. If I upgrade the turbos, from what I’ve read, that’s when it starts maxing out.

[@moeguns4894]

I have no idea what you’re doing but watching you guys work on a GTR is like watching a swim suit babe get a tattoo on her thigh.

[@oreally8605]

A speed shop would charge you big bucks to get to that bolt

[@stacydornan9765]

Where's your impact gun fellas

[@BrosFOURRSpeed]

Definitely not using that on the turbo bolts. Plus there are way too many extensions and 360 joint for an impact to seem like an effective way

[@stacydornan9765]

@@BrosFOURRSpeed You'd coulda used a 3/8 drive impact

[@BrosFOURRSpeed]

@@stacydornan9765 I'm not risking that sort of pressure on the turbos. Taking the time with a large breaker bar was easy enough

[@marcusp2907]

Race tannor Fox

[@dabreyon]

3rd

[@dawsonramdass1145]

FIRST

[@austina4189]

FOURRTH

[@icon_xb2grich]

It’s totally pain in the ass

[@BrosFOURRSpeed]

It wasn't that bad, just very tedious and you really have take your time and have good extensions all set up well. It was a fun challenge

[@mathewsjohn5934]

Bad recommendation..changing downpipe give awesome sound but it give extra problems unless u do it by ur own

[@BrosFOURRSpeed]

As long as you have the proper supporting mods and a good tuner, you won't have issues. My 02 sensors are turned off with the tune. So it will still pass inspection lol

[@mathewsjohn5934]

@@BrosFOURRSpeed well from my experience..I won't let any tuners to change the settings of the car..whether he is good or bad..I think Japanese intelligent engineers has made gtr a super powerful car with perfect mods & settings ! Its a mess to let some street tuners to spoil it off..anyway good for that u are happy with your car..enjoy bro !

[@Sivicy]

definitely not as loud as you can make it lol

[@BrosFOURRSpeed]

Pretty much tho. Valves open it is straight pipes. I guess turbo dump behind the front wheels would be louder lol. Here is how it sound after the injectors and tune! kzbin.info/www/bejne/Z57Te2hmd72if6M