Hey men... i installed the GWR header today. Unbolting the engine mount was not required. I was prepped to do so, but w only a lil fanagling, i removed the OEM manifold. Thx so much for this video. I wild not have tried this mod without your guidance.
Great work guys both on the video as well as the actual wrench turning. I thought I recognized Mt Trashmore in VA Beach, VA, on the way to you’re Home Depot, but then when you went for a test drive along the Calif coast, I knew I was wrong. Good luck on future work! 73s Tom KC3QAC
12:48 The moment you realized you'd bought a used header, though you paid for a new one. And while the exterior finish of the pipe is nice, the interior porting, where smoothness actually means something, is unacceptably rough. Had this been my purchase, the video would have been much shorter. As in: a call to the manufacturer to get an RMA number, repacking, and dropping the box off at UPS. And never buying from that manufacturer again. Because that old saying is true: "Fool me once, your fault. Fool me twice, mine." Ten additional horsepower from a bolt-on header with no engine management computer retune? What a nice, round, convenient number! Where did it come from? The manufacturer? If so, I'll give you a grain of salt to take it with. Whether measured at the wheels or at the crank, ten additional horsepower should make an ND2 measurably quicker. Did do compare pre-install and post-install zero to sixty times? I'm not an expert, but it makes sense to me that if a header makes the engine breathe better, it must be running leaner. This hot-rodded four-banger is already running super lean and with a very high compression ratio: 13:1. I'm sure you are aware of the consequences of running TOO lean. I know the header comes with a lifetime warranty (handy when you buy one that is already used), but how does it affect the manufacturer's warranty on the engine?
Hi, I have the same issue with a leak at the flange - did you end up fixing it? If so, how did you get around to it? I've tried a lot of gaskets and it still seems to leak intermittently
Nice video! I didn't need to unbolt the engine mount to take the factory header out (just unbolted those two hose brackets to make room). I did however need to entirely remove the engine mount to install my GWR longtube. Working around the header to bolt the mount back on is... not fun :(
@@joshuamaynard711 love it! Super loud (paired with GWR race exhaust), got tons of compliments. Did an off the shelf openflash tune, which (in theory) added 30 hp or so. Downsides of GWR longtube - super low midpipe. looks awesome but hangs and easily scraped. I took my headers off prepping it for winter. Now I'm switching project cars so I could probably give you a pretty good deal on headers if you're interested - realkiran@gmail.com
These videos make me feel bad for getting myself into older “project” cars. Waaay more issues getting things out and previous leaks that were ignored by pre owners have a big mess waiting for you
After i've installed the header the engine light has appeared, i think at the first 30 miles this is ok, but after 30 miles the engine light comes back on, did you have the same issues?
How can you tell if you had a exhaust leak? Also did the O2 sensor complain and turn the CEL on? I got a 2017 MX 5 used from a dealership and they said that the CEL was on due to the exhaust manifold being replaced.
The car has a tune but the CEL would come on without the tune. Exhaust leak sounds like a "tick tick tick" and you would see black soot around the flange
So my o2 sensor melted, and it don't let my car start, if I replace the harness you think it'll start right back up??, I tried to turn it on without the sensor plugged in and still no start
@@JetFuelOnly alright fs thank you🤙, and yeah that's what I was thinking it would do, but ig 4 of the wires including the power wire merged with each other which mightve cuased some sort of circuit cut?🤷♂️
Really helpful video man, gives me an insight into how the installation will be. Def will come back when I actually buy them. Also have some questions, does the CEL tune come with the headers? Do you think it will still pass emissions with the stock mid-pipe cats? In GA all we do is scan the vehicle with OBDII ports
I had the same issue with my JDL Header (chips & gouges in both flanges) though I wasn't ask lucky when I called JDL. Said they were inundated with work around Black Friday and got them rushed out; they told me over the phone it won't affect the performance or integrity but to let them know if I run into issues installing it. No replacement for me.
Chris Leclair damn. Sorry to hear that! It’s probably fine though. We had a leak and couldn’t quite nail down the source so we were extra worried that was the cause but it wasn’t.
@@JetFuelOnly check engine light, it drives kinda choppy and doesn’t accelerate linear, p0134 is the code. So maybe something wrong with the o2 sensor?
@@hintofreality9876 yes that code is related to the o2 sensor. Was it handled properly? Did you get antiseize on it? Did you damage it in removal or install? Has the wire melted on the exhaust?
Thanks for your review and information. Please , How do you prevent the check engine light from being on? Because of the cancellation of the catalytic converter
You need someone to tune the car. You really shouldn’t run the car hard without cats anyway as it can lead to a lean fuel condition. Message Schmidty Tuning
The extension is for the header. The o2 sensor is mounted on the header and since it’s elongated the wire needs to be extended. It’s included with this header
@@JetFuelOnly I'll take that as a "No." Which means that at smog test time, you get to re-install the stock header. I suppose the swap gets easier with practice. Considering the number of work-arounds you guys had to do -- and still were not successful the first time due to a suspiciously worn mid-section -- I can't help but feel sympathy for the non-expert who forks out the better part of a thousand bucks and does not have your guidance installing the thing.
Ah must be nice to live somewhere without emissions... Unfortunately where I'm at, you can only do this on an antique car, modern cars cannot be modified in any way.
YOU are my new best friend! THIS IS HOW EVERY INSTALL VIDEO SHOULD BE! Thank you!
Glad you liked it! Thanks
Holy detail dude thank you for such a detailed install. Thank you for putting torque specs they can be kind of a headache to find.
This is an awesome install video. Extremely well laid out.
Nice job with the careful install. This can be done without unbolting the engine mount.
How?
Wow that’s an excellent video!! I wish there was more like this for other cars as well!
Thanks!
What a great video, especially loved the overview at the start. Thanks for sharing!
Hey men... i installed the GWR header today. Unbolting the engine mount was not required. I was prepped to do so, but w only a lil fanagling, i removed the OEM manifold. Thx so much for this video. I wild not have tried this mod without your guidance.
Great Video! I was iffy about doing this install myself due to disability but this looks very doable.
Great work guys both on the video as well as the actual wrench turning. I thought I recognized Mt Trashmore in VA Beach, VA, on the way to you’re Home Depot, but then when you went for a test drive along the Calif coast, I knew I was wrong. Good luck on future work! 73s Tom KC3QAC
Good clean hard job, and the Polaroid shirt original,,,nice. I have the 2019,RF, model, boths car are exclusive ,,salutes from P.R.
Thanks for this guide. It's extraordinarily helpful.
Nice work gents!
Best instructional videos! Thank you!
excellent video
Hey good video style fella, thanks for the tips 👍🏻
Well done, very detailed!
That looks so much easier to work on than an NA or NB
12:48 The moment you realized you'd bought a used header, though you paid for a new one. And while the exterior finish of the pipe is nice, the interior porting, where smoothness actually means something, is unacceptably rough. Had this been my purchase, the video would have been much shorter. As in: a call to the manufacturer to get an RMA number, repacking, and dropping the box off at UPS. And never buying from that manufacturer again. Because that old saying is true: "Fool me once, your fault. Fool me twice, mine."
Ten additional horsepower from a bolt-on header with no engine management computer retune? What a nice, round, convenient number! Where did it come from? The manufacturer? If so, I'll give you a grain of salt to take it with. Whether measured at the wheels or at the crank, ten additional horsepower should make an ND2 measurably quicker. Did do compare pre-install and post-install zero to sixty times?
I'm not an expert, but it makes sense to me that if a header makes the engine breathe better, it must be running leaner. This hot-rodded four-banger is already running super lean and with a very high compression ratio: 13:1. I'm sure you are aware of the consequences of running TOO lean. I know the header comes with a lifetime warranty (handy when you buy one that is already used), but how does it affect the manufacturer's warranty on the engine?
This is actually a really good question, I imagine on a car this new significant HP gains wouldn’t be possible without the appropriate tune.
Hi, I have the same issue with a leak at the flange - did you end up fixing it? If so, how did you get around to it? I've tried a lot of gaskets and it still seems to leak intermittently
Vince had to buy a midpipe with a flex joint. That was the only thing that fixed it. I’m several years in and no gasket leak yet.
Excellent reference video 👍
Excellent DIY video.
Nice video! I didn't need to unbolt the engine mount to take the factory header out (just unbolted those two hose brackets to make room). I did however need to entirely remove the engine mount to install my GWR longtube. Working around the header to bolt the mount back on is... not fun :(
xskinyx good to know! Thanks for the feedback! We did loosen the whole engine mount first time and it was a little easier.
xskinyx How do you like the GWR longtube? Are you tuned? ND1 or ND2? I have ND2 and researching the best options. Thanks, dude.
@@joshuamaynard711 love it! Super loud (paired with GWR race exhaust), got tons of compliments. Did an off the shelf openflash tune, which (in theory) added 30 hp or so.
Downsides of GWR longtube - super low midpipe. looks awesome but hangs and easily scraped.
I took my headers off prepping it for winter. Now I'm switching project cars so I could probably give you a pretty good deal on headers if you're interested - realkiran@gmail.com
These videos make me feel bad for getting myself into older “project” cars. Waaay more issues getting things out and previous leaks that were ignored by pre owners have a big mess waiting for you
After i've installed the header the engine light has appeared, i think at the first 30 miles this is ok, but after 30 miles the engine light comes back on, did you have the same issues?
This car was tuned and part of the tune removes the engine light
Nice install!
How can you tell if you had a exhaust leak? Also did the O2 sensor complain and turn the CEL on?
I got a 2017 MX 5 used from a dealership and they said that the CEL was on due to the exhaust manifold being replaced.
The car has a tune but the CEL would come on without the tune. Exhaust leak sounds like a "tick tick tick" and you would see black soot around the flange
So my o2 sensor melted, and it don't let my car start, if I replace the harness you think it'll start right back up??, I tried to turn it on without the sensor plugged in and still no start
Yeah, it should start up. I’m surprised it won’t start usually it just runs awful. Might need to disconnect battery for a bit first.
@@JetFuelOnly alright fs thank you🤙, and yeah that's what I was thinking it would do, but ig 4 of the wires including the power wire merged with each other which mightve cuased some sort of circuit cut?🤷♂️
Yeah hope it didn’t cause any damage
Really helpful video man, gives me an insight into how the installation will be. Def will come back when I actually buy them.
Also have some questions, does the CEL tune come with the headers? Do you think it will still pass emissions with the stock mid-pipe cats? In GA all we do is scan the vehicle with OBDII ports
Yes will cause CEL without a tune. In GA your will be fine if you can get the specific code set to not report via tuning software
@@JetFuelOnly Thank you!
Any CEL? If extension bolt can help? Any tuner can tune nd2 n remove the error?
Most canned and custom tunes can do this.
I had the same issue with my JDL Header (chips & gouges in both flanges) though I wasn't ask lucky when I called JDL. Said they were inundated with work around Black Friday and got them rushed out; they told me over the phone it won't affect the performance or integrity but to let them know if I run into issues installing it. No replacement for me.
Chris Leclair damn. Sorry to hear that! It’s probably fine though. We had a leak and couldn’t quite nail down the source so we were extra worried that was the cause but it wasn’t.
Was installing the header worth it?
I had misfire right after the install and re checked the mid pipe for leaks. Do you think I need an o2 spacer?
Misfire shouldn’t happen with exhaust leak. Was it at idle or under load? Do you have a check engine light?
@@JetFuelOnly check engine light, it drives kinda choppy and doesn’t accelerate linear, p0134 is the code. So maybe something wrong with the o2 sensor?
@@hintofreality9876 yes that code is related to the o2 sensor. Was it handled properly? Did you get antiseize on it? Did you damage it in removal or install? Has the wire melted on the exhaust?
@@JetFuelOnly from your reply I guess it’s safe to say I should get a new one!
Thanks for your review and information.
Please , How do you prevent the check engine light from being on?
Because of the cancellation of the catalytic converter
You need someone to tune the car. You really shouldn’t run the car hard without cats anyway as it can lead to a lean fuel condition. Message Schmidty Tuning
@@JetFuelOnly
Thanks
And what can you say about performance gain on the ND2?
Owner says top end feels a bit stronger.
@@JetFuelOnly Also known as "damning with faint praise."
Are these street legal?
Pf duh state by state 😅
Does the engine block heat up enough to create a problem with the sensor cord? Your videos are very helpful.
The block probably not but the header for sure.
Does that header remove the cat? Kind of looks like it, any tuning required and what about engine codes/inspection?
Yes it removes the cat. Yes tuning is suggested, and it will give a check engine light if not tuned out.
@@JetFuelOnly Has anyone cracked the ND2 ECU yet?
I don’t know about that. I’m not a Miata owner. Maybe one can chime in? Or check with the Miata groups. Sorry I’m not as helpful with Miata stuff
Were you installing to stock midpipe here? Was only one O2 sensor extension needed to avoid CELs?
No that was a different midpipe. The extension is so it can reach. CEL gets removed with the tuning
@@JetFuelOnly thanks for your reply. so no extension is needed when connecting to stock midpipe?
The extension is for the header. The o2 sensor is mounted on the header and since it’s elongated the wire needs to be extended. It’s included with this header
Did you have any issues with the o2 sensor cord getting hot? Thanks for the video.
No. Just needs to be appropriately routed to avoid co tact
How much does this weigh compared to stock?
We did not weigh it.
hello, did u need to get the car tuned after installation
To keep from getting a check engine light … yes
I have a leak as well, did you say you just replaced the gasket?
If you have this setup it can leak often unfortunately
Is this a catless header?
Yes
Very good explanation how you can install the header. Do you feel some power gain?
Regards from Spain!
Albert Cars thank you. Vince thinks he can feel a little more power in the upper RPM range
How did you get around a 420 cat CEL?
A tune was added later
Is the bolst pattern the same on nd1 manifold
I’m not sure. But I think they are as these are made for 2016+. Always check with the seller
the nuts on the heat shield on a 2018 are 12 mm not 14mm
I may have it wrong in the video too! But there are so many 14mm bolts on the Miata haha
@@JetFuelOnly sooooo true lol this is a great video helped me out the most for sure
Excellent presentation. Will an ND2 with this header pass California smog?
John Richards it won’t pass a visual inspection. But it will pass a sniffer I believe.
@@JetFuelOnly I'll take that as a "No." Which means that at smog test time, you get to re-install the stock header. I suppose the swap gets easier with practice. Considering the number of work-arounds you guys had to do -- and still were not successful the first time due to a suspiciously worn mid-section -- I can't help but feel sympathy for the non-expert who forks out the better part of a thousand bucks and does not have your guidance installing the thing.
Does this void the warranty?
It might. It’s up to the shop. Also it would only affect engine warranty
Nice rocker cover scratches 🤣
Is that a stock midpipe?
Yes
Did you get a check engine light?
Yes, had to be turned off with tuner
Did the cel makes ur car in limp mode?
Never let it get that far. Tuned it before the CEL could happen.
Any notable power gain?
Owner says top end a little.
Let me guess....not legal in California... Nice job guys.
True! Won’t pass a visual inspection but should pass the sniffer.
Thanks! Now I know I never want to do this lol
10HP but what about torque?
About as much torque as my Dewalt. Lol.
Don't you hate living in California when you see this? LOL
am i the only one that was expecting a drive by or sound clip of some kind?
We will have some sound clips in the next video with some muffler swaps
Is this CA legal?
No I don’t believe so. It will have to be swapped out at smog check
Ah must be nice to live somewhere without emissions... Unfortunately where I'm at, you can only do this on an antique car, modern cars cannot be modified in any way.
This is California… we just don’t get emissions check for 5 or 6 years after buying a new car
Lubricant? Lubrican!
In Australia, to install the header will make the car unroadworthy. Told by my mechanic
Throwin CEL's.
Yup there is one, but it gets turned off with tuning
10 horsepower... Yea right...
físeán iontach
sounds awful