2 GT-One Headers in Stock!

[GTOneUSA]

Along with the announcement, I would like to put these 2 NA1 GT-One Headers for sale that I managed to bring along with me from my recent trip to Japan.
We are offering free fedex ground shipping for these 2 headers only! Price $2,650. Regular price will be $2750 plus shipping
For more info

ＧＴ－ＯＮＥ　Ｆ１ Series mufflers and exhausts are made with one thing in mind - the NSX. The goal was to produce an exhaust system that could produce the F1 sound and feel just like the soul of the NSX.

Finally, parts made to the highest of standards to bring your car closer its
full potential in response and power. GT-One is Japanese craftsmanship and quality at its best!

- 50mm main pipe, perfectly matched for our F1 sound.
- Stock length and as perfect a fit.
- With pinpoint welds and smoothed finish

The manifolds were designed and redesigned five times over to insure a perfect mesh of response and sound. From dyno tests on several NSX models and applications.

F1 cars at their peak usually hit over 18,000rpm with exhausts manifolds about 40cm in length. With the NSX peak being around 8,000rpm, it's only logical to have our manifolds cut to a perfect fitting 80cm.

After extensive tests of finished exhausts the angle of the junction port was tested at 12, 14, and 16 degrees. The best increase in torque was from 14 degrees. And that is what helps separate this awesome piece of machinery from less tested "competition".

For more info

 

[GTOne-Japan]

What are you waiting for-in stock...free shipping...no duties...the real deal...
DJ

 

[nsxtacey]

Fits only Na1 and Na2 with other mods correct? Wish you made a direct fit for Na2. Only reason why i went with comptech headers. Please provide dyno #'s if available.

 

[GTOneUSA]

Fits only Na1 and Na2 with other mods correct? Wish you made a direct fit for Na2. Only reason why i went with comptech headers. Please provide dyno #'s if available.

Yes NA2 with other mods. Basically if you're planning to upgrade your exhaust and catalyst then you can bolt on this NA1 header with NA1GT-One exhaust systems with no problem. I'll get the Dyno# asap.

Some pics of the headers :

At Osaka Airport, checking in the baggage:

 

[Matt_337]

Henry

What if you have a GT-One exhaust that is made for an NA2 LEV (no adapter pipes)?
Then this NA1 header wouldn't just "bolt" right up, would it?

 

[chado]

I will have one of these soon enough.. just need a few other mods first and wait on a few financial issues. Cant wait though!

 

[nsxtacey]

Henry

What if you have a GT-One exhaust that is made for an NA2 LEV (no adapter pipes)?
Then this NA1 header wouldn't just "bolt" right up, would it?

think you'll need custom test pipes...thought you wanted to get ver 5.1 though?

 

[Matt_337]

think you'll need custom test pipes...thought you wanted to get ver 5.1 though?

I decided to stick it out with my N1 for a bit. I will change to a V5.1 later on down the road after I do headers and test pipe if it still isn't loud enough.

 

[GTOneUSA]

Henry

What if you have a GT-One exhaust that is made for an NA2 LEV (no adapter pipes)?
Then this NA1 header wouldn't just "bolt" right up, would it?

No, it would not be a direct bolt on. Sell your N1 titanium exhaust and get the 5.1 with test pipe :biggrin:

 

[nsxtacey]

I decided to stick it out with my N1 for a bit. I will change to a V5.1 later on down the road after I do headers and test pipe if it still isn't loud enough.

I'd do test pipes first, dB will increase no doubt.

 

[WingZ]

Hello

Any left?

 

[GTOneUSA]

Hello

Any left?

2 left in stock and free shipping, let me know.

 

[TURBO2GO]

Hello

Any left?

hahahahaha :biggrin:

Luke, I am your father... join me...

 

[GTOne-Japan]

If only there were more like us...:biggrin:

Get with it folks...this is the only way to go...find out why wives refuse to allow husbands to ride with GT-One mechanic Mr. Yamamoto...this stuff is addictive man!:tongue:

NSX Diary...
1st I got ONE!!My first NSX, thanks PRIME!!
2nd New exhaust...sounds nice...
3rd Saved money$Got a GT-One SS or Titanium Ver5.1!I am feeling it now!!
4th Not enough money so got a cheaper header system...sounds ok...
5th Saved more money$Got a GT-One F1 Header setup!!My goodness, this is what everyone's been talking about!!
6th From now on consult with Henry, DJ and Mr. Tamura before making any more wastefull NSX purchases to maximize the amount of gas money I have to enjoy my car!!
In the end do it right the first time and you'll be much happier in the long run...
DJ

 

[WingZ]

hahahahaha :biggrin:

Luke, I am your father... join me...

LOL time to join the dingy side of the force!

I think I wanna do this with a GruppeM exhaust ,but I'm concerned there may be too much drone for me to take interstate track trips. Any drone on your system Dave?

 

[TURBO2GO]

LOL time to join the dingy side of the force!

I think I wanna do this with a GruppeM exhaust ,but I'm concerned there may be too much drone for me to take interstate track trips. Any drone on your system Dave?

Honestly? almost none. Its pretty weird... the thing is quiet inside the cabin at lower revs when the windows are up. I mean its not stock mind you... but no droning... pretty darn comfortable. Of course I have the valve and if it helps anywhere, its with drone at highway speeds. But even with the valve open, its not bad at all.

Oh man when I cruise down the street in my car and keep the revs at or around 4K and sometimes let off everyone within sight stares... people point, kids jump up and down. It just sounds so different than other cars and so nice.

The worst part of the exhaust system is actually a bit of a tinny sound that you experience just as the system is about to transition from its normal voice to that super high pitch. That extra bit of high frequency which is not good at that particular RPM range (right between 3-4K mid throttle) is really only heard from being up close to the system (like driving with the targa off) and when just cruising. And only at that RPM. Its easily avoidable by the way you drive.

I managed to catch that worst part exactly on my last two videos... and so I deleted them because they were not really representative of the system. From the street, standing on the side or from inside the car, that annoying high frequency tin is just not heard anymore leaving only the best part of the sound. So if there is a flaw in the system it is this... but its not a big deal to me. Wide open its awesome. I am going to do more videos and post soon.

 

[WingZ]

Honestly? almost none. Its pretty weird... the thing is quiet inside the cabin at lower revs when the windows are up. I mean its not stock mind you... but no droning... pretty darn comfortable. Of course I have the valve and if it helps anywhere, its with drone at highway speeds. But even with the valve open, its not bad at all.

Oh man when I cruise down the street in my car and keep the revs at or around 4K and sometimes let off everyone within sight stares... people point, kids jump up and down. It just sounds so different than other cars and so nice.

The worst part of the exhaust system is actually a bit of a tinny sound that you experience just as the system is about to transition from its normal voice to that super high pitch. That extra bit of high frequency which is not good at that particular RPM range (right between 3-4K mid throttle) is really only heard from being up close to the system (like driving with the targa off) and when just cruising. And only at that RPM. Its easily avoidable by the way you drive.

I managed to catch that worst part exactly on my last two videos... and so I deleted them because they were not really representative of the system. From the street, standing on the side or from inside the car, that annoying high frequency tin is just not heard anymore leaving only the best part of the sound. So if there is a flaw in the system it is this... but its not a big deal to me. Wide open its awesome. I am going to do more videos and post soon.

Hmmm your making it harder for me not to do this...dad LOL

I think your car has sounded awesome in all the vids you've posted so far. I guess my only other hang up has been taking out the cats as although Michigan does not have any emission testing no one will remove your cats. Plus according to what I've read so far I'll need someone to weld in spark plug defoulers right? Also can anyone tell me what all I'll need to do this? I think it's these four items ,but I'm not sure.

1. GT one headers
2. GruppeM exhaust
3. Test pipes ( not sure on this since the GruppeM exhaust eliminates the cats and is supposed to bolt right to the headers?? ) http://www.nsxprime.com/forums/showthread.php?t=62977&highlight=gruppem+v3

4. Spark plug defoulers

 

[TURBO2GO]

You need to weld bungs on because your GM exhaust has no provisions for cats. If you have test pipes, they already have 02 housings built in. Then you just screw on the 02 sensors and those e-bay adaptors into the bypass pipes. If you want to put in cats, you can.

Basically, you need to change the system to NA1. Buy an NA1 exhaust (this header advertised here is NA1 and so needs an NA1 muffler). According to Mr. Tamura it has better flow anyway.

I don't want to tell you what to do, but I would not buy an exhaust system that makes no provisions for cats. Now you have the extra cost and time of drilling and welding... and you can never install cats if you decide you want to be clean, legal, and quiet. I would think long and hard. I have never heard it in person, but does the GM sound better than the V5 or 5.1 to you?

Oh and you only need two "spark plug defoulers", not 4. Two of your 02 sensors need to sit in the header and do what they do.

 

[WingZ]

You need to weld bungs on because your GM exhaust has no provisions for cats. If you have test pipes, they already have 02 housings built in. Then you just screw on the 02 sensors and those e-bay adaptors into the bypass pipes. If you want to put in cats, you can.

Basically, you need to change the system to NA1. Buy an NA1 exhaust (this header advertised here is NA1 and so needs an NA1 muffler). According to Mr. Tamura it has better flow anyway.

I don't want to tell you what to do, but I would not buy an exhaust system that makes no provisions for cats. Now you have the extra cost and time of drilling and welding... and you can never install cats if you decide you want to be clean, legal, and quiet. I would think long and hard. I have never heard it in person, but does the GM sound better than the V5 or 5.1 to you?

Oh and you only need two "spark plug defoulers", not 4. Two of your 02 sensors need to sit in the header and do what they do.

Thanks ,but does your current system have a provision for cats? That's been the problem that none of the JDM market stuff allows for cats. I currently have a JACK SPORTS exhaust and that of course was for a NA1 car as well.

I've no expeirence with either set up in real life on an NSX. The closest I've had to GruppeM is the GruppeM that I had on my M3. I hated the fact that once I put the GM on my M3 my GT-ONE N1 was no comparison so I tried the JS exhaust and I'm still missing that GM sound:frown:

I honestly don't want a set up w/o cats ,but the only choice for a system with cats is the Cantrell and I would really like to try the GT-ONE headers as I've been wanting a set for awhile ,but had to for go since they don't allow for cats.

GT ONE USA offering this great price is not helping:biggrin:

 

[TURBO2GO]

I don't know what you are talking about... if I was not running my CAT bypass pipes, I would have a big empty space between where the header ends, and the exhaust begins. My GT-ONE NA1 exhaust that is GT-One F1 header and GT-One V5.0 muffler (to clear any confusion), is designed to use NA1 cats. Two 02 sensors fit inside the headers, and two fit inside the cats or cat bypass pipes. The bypass pipes have bungs welded on already (although mine were incorrect in their size and this is something you should check on with Mr. Tamura). You will need the two e-bay adaptors (shown to me by Vance) inside the cat bypass pipes to prevent a CEL. However, you may still get a CEL once in a blue moon (he doesn't, I do).

If the Grupe M V3 has no provisions at all for cats, that is not good. I have a feeling that if you get the GM, you will say "wow well it still doesn't sound like my M3 what a dissapointment". And that may happen if you get the GT-One too, but at least I can tell you it will sound really good even if its not like the M3. I mean they are different engines.

Also, I happened to take Mr. Tamura's recommendation and get Japanese Jazz (Honda FIT here) 02 sensors which he says are not only cheaper but better in quality. From what I understood, he said that the increased flow of exhaust volume on highly moded NA NSX's sends the standard 02 sensors into a tizzy eventualy (he didn't use the word tizzy :biggrin: ) and the ones he gave me were a better choice.

Another FYI... My main beam had to be shaved about 1/16" of an inch to get the headers to clear properly. Very small thing... but it was necessary. You have to take into account the hand-built nature of the NSX... they are all just a little different. But the overall fit and quality is really amazing.

 

[WingZ]

I don't know what you are talking about... if I was not running my CAT bypass pipes, I would have a big empty space between where the header ends, and the exhaust begins. My GT-ONE NA1 exhaust that is GT-One F1 header and GT-One V5.0 muffler (to clear any confusion), is designed to use NA1 cats. Two 02 sensors fit inside the headers, and two fit inside the cats or cat bypass pipes. The bypass pipes have bungs welded on already (although mine were incorrect in their size and this is something you should check on with Mr. Tamura). You will need the two e-bay adaptors (shown to me by Vance) inside the cat bypass pipes to prevent a CEL. However, you may still get a CEL once in a blue moon (he doesn't, I do).

If the Grupe M V3 has no provisions at all for cats, that is not good. I have a feeling that if you get the GM, you will say "wow well it still doesn't sound like my M3 what a dissapointment". And that may happen if you get the GT-One too, but at least I can tell you it will sound really good even if its not like the M3. I mean they are different engines.

Also, I happened to take Mr. Tamura's recommendation and get Japanese Jazz (Honda FIT here) 02 sensors which he says are not only cheaper but better in quality. From what I understood, he said that the increased flow of exhaust volume on highly moded NA NSX's sends the standard 02 sensors into a tizzy eventualy (he didn't use the word tizzy :biggrin: ) and the ones he gave me were a better choice.

Another FYI... My main beam had to be shaved about 1/16" of an inch to get the headers to clear properly. Very small thing... but it was necessary. You have to take into account the hand-built nature of the NSX... they are all just a little different. But the overall fit and quality is really amazing.

Yeah sorry about that Henry. Dad and I got a little carried away. We'll continue our discussion via pm. I hope to let you know soon about the headers!

 

[TURBO2GO]

DJ/Henry... please let Mr. Tamura know that the fittings on the cat bypass pipes are an incorrect size. Both John (NSXtacey) and I could not fit 02 sensors into these pipes. I had to weld new fittings on mine... and it looks like John will have to on his. I don't know where the problem is... please check into this.

 

[GTOne-Japan]

If I'm not mistaken those were Taitec pipes you bought right? We have since made our own and this should also fix the quality issues that we have since heard of. Not a bash just a fact. I will check on the Jazz sensors because our red demo has been holding up very well and no check engine lights on in over 3 or 4 months, and this is after cruises of 600km (to Hiroshima and back to Osaka during Sunday stop and go traffic).
DJ

 

[GTOneUSA]

If I'm not mistaken those were Taitec pipes you bought right? We have since made our own and this should also fix the quality issues that we have since heard of. Not a bash just a fact. I will check on the Jazz sensors because our red demo has been holding up very well and no check engine lights on in over 3 or 4 months, and this is after cruises of 600km (to Hiroshima and back to Osaka during Sunday stop and go traffic).
DJ

Thanks DJ.

Yeah sorry about that Henry. Dad and I got a little carried away. We'll continue our discussion via pm. I hope to let you know soon about the headers!

Sorry for the late reply, been busy with the website.

Not a problem at all, you're welcome to discuss it here. Thanks Turbo2go for all the info.

WingZ, I am not familiar with GM exhaust but, if I am not mistaken, GM exhaust is made for NA1 so it should bolt on to NA1 GT-One F1 Header that I have in stock.
If you're using your stock NA2 header with GM exhaust now, then I assume that your modified the exhaust or the test pipe to fit the GM exhaust.

The best way is of course to get NA1 GT-One exhaust system (F1 header, test-pipe, and F1 exhaust) but if you want the Gruppe M exhaust then we also can get the exhaust for you from Japan.

 

[UnhuZ]

Also, I happened to take Mr. Tamura's recommendation and get Japanese Jazz (Honda FIT here) 02 sensors which he says are not only cheaper but better in quality. From what I understood, he said that the increased flow of exhaust volume on highly moded NA NSX's sends the standard 02 sensors into a tizzy eventualy (he didn't use the word tizzy :biggrin: ) and the ones he gave me were a better choice.

Well, because of your experience, my friend who also bought and installed the GT-One complete exhaust, asked Hitoshi about those Fit o2 sensors, and he tolded back that they wouldn't solve the problem, only a opened ECU would do

DJ, can you clarify this??

EDIT: the problem is CEL and rich A/F allover...