is na2 exhaust better? what do i need?

[Hksdrager7]

Is there any horse power gain between the na2 exhaust and the na1? If i want to make the switch to na2 full exhaust what do i need? The headers the cats and the muffler that should be it right? Oh i did read that you will need to extend the o2 wiring. Thanks mates

 

[angus]

Are you talking about upgrading just the headers? (there are quite a few threads on this)

Or do you mean the WHOLE system - i.e. headers , cats , muffler etc?

Both can easily be done , finding the parts is hit or miss.

 

[dablackgoku1234]

You are better off finding the whole system, headers, cats, exhaust rather than mixing and matching. And yes, to use the NA2 headers on an NA1 car, you'll need O2 sensor wire extensions.

 

[Hksdrager7]

Yes I mean to change the whole exhaust to the na2 but are there any real gains?

 

[OLDMNSX]

Well, I think so. Yes, you will have to extend the O2 sensor harnesses. You can make the adapters from parts that you can get from a salvage yard, or buy them already made. I replaced my complete 91 exhaust system from the heads back. I found a set of 98 headers and cats and found a usedARC DT-X exhaust and LOVE IT. I think that I am into the whole thing about $1200 or $1300.
Brad

 

[Honcho]

Yes I mean to change the whole exhaust to the na2 but are there any real gains?

Yes. Most of the gains are from the NA2 headers. About 10-15whp

 

[oscar_driver]

You can start from here

http://www.nsxprime.com/forums/showthread.php?t=124787
:biggrin::biggrin:

 

[trainingrevolution]

<HR style="BACKGROUND-COLOR: #d1d1e1; COLOR: #d1d1e1" SIZE=1> <!-- / icon and title --><!-- message -->
Here is my .02, I installed 1997 headers on my 1992. Take it for what its worth. Having known then what I know now I would have purchased a nice gently used set of CompTech headers.

If you are getting OEM headers consider the following:

1. Spend $ on aftermarket headers
Labor is the same or more if you use factory headers.
2. If you do decide to use Factory Headers, re-Weld the Factory OEM Headers
The factory OEM headers are tack welded and can crack at the seam, I brought my headers to turbochargers.com in Houston and they put a bead weld all the way around.
3. If you do decide to use Factory Headers, Jetcoat them (ceramic coating)
Jethotcoatings.com
4. Install them yourself
Just saw a great write-up posted in the DIY forum

Here were the costs involved (it was GROSSLY more expensive than I had anticipated when all was said and done).

NSX Prime Used Heades 19K Miles $350

SoS EAP-665 1997-99 Header Conversion Kit ($274), O2 Sensor Extension Harness Kit ($79) + Shipping ($8) Total $361.

Delray Acura Zanardi Rear Sway Bar (required if you plan on using catalytic converters from 1997) ($82.39) + Shipping ($8.95) Total $91.34

Turbochargers.com Labor to weld headers Total $150.

Jet-Hot Ceramic Coating ($235.00) + Shipping ($34) Total $269.

Gaskets
(2) 18115-PR7-A02 Gasket, EX, MAN ($53.84), (2) 18212-SA0-003 Gasket, EX PIP ($19.04) (2) GSKT 52.5MM-53 ($28.86) Total $101.74

David McDavid Acura Labor $735.00

Headers + Installation $2,058.08

After installing the headers I decided that I also wanted a CompTech Exhuast.

I purchased the Comptech Exhaust for $944.09 shipped, and dealer installation was $225.00.

Exhaust + Installation $1,169.09

Grand Total $3,227.17

 

[tosugrad]

I think the $960 of dealer labor can be cut in half by an independent or $0 do it yourself.

 

[angus]

<HR style="BACKGROUND-COLOR: #d1d1e1; COLOR: #d1d1e1" SIZE=1> <!-- / icon and title --><!-- message -->
Here is my .02, I installed 1997 headers on my 1992. Take it for what its worth. Having known then what I know now I would have purchased a nice gently used set of CompTech headers.

If you are getting OEM headers consider the following:

1. Spend $ on aftermarket headers
Labor is the same or more if you use factory headers.
2. If you do decide to use Factory Headers, re-Weld the Factory OEM Headers
The factory OEM headers are tack welded and can crack at the seam, I brought my headers to turbochargers.com in Houston and they put a bead weld all the way around.
3. If you do decide to use Factory Headers, Jetcoat them (ceramic coating)
Jethotcoatings.com
4. Install them yourself
Just saw a great write-up posted in the DIY forum

Here were the costs involved (it was GROSSLY more expensive than I had anticipated when all was said and done).

NSX Prime Used Heades 19K Miles $350

SoS EAP-665 1997-99 Header Conversion Kit ($274), O2 Sensor Extension Harness Kit ($79) + Shipping ($8) Total $361.

Delray Acura Zanardi Rear Sway Bar (required if you plan on using catalytic converters from 1997) ($82.39) + Shipping ($8.95) Total $91.34

Turbochargers.com Labor to weld headers Total $150.

Jet-Hot Ceramic Coating ($235.00) + Shipping ($34) Total $269.

Gaskets
(2) 18115-PR7-A02 Gasket, EX, MAN ($53.84), (2) 18212-SA0-003 Gasket, EX PIP ($19.04) (2) GSKT 52.5MM-53 ($28.86) Total $101.74

David McDavid Acura Labor $735.00

Headers + Installation $2,058.08

After installing the headers I decided that I also wanted a CompTech Exhuast.

I purchased the Comptech Exhaust for $944.09 shipped, and dealer installation was $225.00.

Exhaust + Installation $1,169.09

Grand Total $3,227.17

Just as a side note , that is more than 1/2 the cost of my turbo kit , that comes with an exhaust!

 

[Mac Attack]

Sorry, but you did more harm than good putting a full weld on the outside of the flanges. I've never heard of any NA2 headers cracking at the weld seam either?

Yes, there are two small beads per exhaust port on the outside of the flanges from the factory. There is also a full weld on each one from the inside too.

When you also put a full weld on the outside, you are increasing the thermal stresses across each weld due to temperature gradients across the flange and internal/external welds. Also, the OEM heat shields are more effective than ceramic coating. There's a good reason Honda did it the OEM way :wink: If I had spent that extra $400 on those things, then yes, I would have put better headers on.

On my NA2 headers, the inner weld did unecessarily protrude into the exhaust port exit, so I ground some of it out to open up the flow area a little more.

Dave

<HR style="BACKGROUND-COLOR: #d1d1e1; COLOR: #d1d1e1" SIZE=1> <!-- / icon and title --><!-- message -->
Here is my .02, I installed 1997 headers on my 1992. Take it for what its worth. Having known then what I know now I would have purchased a nice gently used set of CompTech headers.

If you are getting OEM headers consider the following:

1. Spend $ on aftermarket headers
Labor is the same or more if you use factory headers.
2. If you do decide to use Factory Headers, re-Weld the Factory OEM Headers
The factory OEM headers are tack welded and can crack at the seam, I brought my headers to turbochargers.com in Houston and they put a bead weld all the way around.
3. If you do decide to use Factory Headers, Jetcoat them (ceramic coating)
Jethotcoatings.com
4. Install them yourself
Just saw a great write-up posted in the DIY forum

Here were the costs involved (it was GROSSLY more expensive than I had anticipated when all was said and done).

NSX Prime Used Heades 19K Miles $350

SoS EAP-665 1997-99 Header Conversion Kit ($274), O2 Sensor Extension Harness Kit ($79) + Shipping ($8) Total $361.

Delray Acura Zanardi Rear Sway Bar (required if you plan on using catalytic converters from 1997) ($82.39) + Shipping ($8.95) Total $91.34

Turbochargers.com Labor to weld headers Total $150.

Jet-Hot Ceramic Coating ($235.00) + Shipping ($34) Total $269.

Gaskets
(2) 18115-PR7-A02 Gasket, EX, MAN ($53.84), (2) 18212-SA0-003 Gasket, EX PIP ($19.04) (2) GSKT 52.5MM-53 ($28.86) Total $101.74

David McDavid Acura Labor $735.00

Headers + Installation $2,058.08

After installing the headers I decided that I also wanted a CompTech Exhuast.

I purchased the Comptech Exhaust for $944.09 shipped, and dealer installation was $225.00.

Exhaust + Installation $1,169.09

Grand Total $3,227.17

 

[trainingrevolution]

Sorry, but you did more harm than good...

My posted response started with "Here is my .02", that's exactly what it is.

I posted my costs to help other primers who may be considering the upgrade.

 

[Mac Attack]

That's fine :smile:, I also posted to inform others that NA2 manifold cracking is not a common concern and that it's not necessary to put an additional weld (it actually hurts more than helps).

Dave