Header Comparisons.

Joined
28 April 2000
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1,190
Location
SF Bay Area / Boston MA
As far as I know there are several aftermarket systems out there.

Comptech, Taitec, DC, and Fujitsubo.

Out of these 4, has anyone done a dyno comparison?

I don't really care which name I get, as long as they have the best combination of hp output, weight reduction, and durabillity. Anyone here have any hard data?
 
Tiatec 22.6 hp
http://www.scienceofspeed.com/produ...oducts/NSX/TAITEC/exhaust_headers/default.asp

Warnick_baseline-exhaust.jpg


Comptech 18 hp
http://www.scienceofspeed.com/products/exhaust_airflow_products/NSX/Comptech/headers/default.asp

Fujitsubo SuperEX SS Exhaust Headers 23hp.
http://www.scienceofspeed.com/products/exhaust_airflow_products/NSX/Fujitsubo/headers/


Performance metrics---Stock baseline NSX----Nsx superEx headers
max hp (crank)----------267.6 PS / 7200 rpm--290.9 PS / 6300 rpm
max torque (crank)-----28.8 kgm / 6160 rpm-29.5 kgm / 6160 rpm
idle------------------------64 dB----------------------70 dB
cruise---------------------96 dB----------------------98 dB
3000rpm-----------------84 dB----------------------85 dB
5000rpm-----------------93 dB----------------------96 dB
4000rpm~6000rpm----101 dB--------------------112 dB


How about this one. :D
Fujitsubo SuperEX INCONEL Exhaust Headers 23hp.
Only $10,995.00 :eek:
 
Last edited:
One thing that cannot be argued is the durability.
The Fujitsubo SS exhaust is made of 321 grade stainless steel.
321 grade stainless steel has a higher nickel content which gives it better ability to cope with high heat stress. Currently the rest of the NSX headers available are made of 304 grade stainless. 321 grade stainless is also a lot more expensive than 304 grade hence the higher price for the Fujitsubo($2400-$2600).

For the Fujitsubo "Inconel" exhaust, the Inconel material has a very high nickel content, but primarily is used in only Formula 1 and other top racing series. Price is astronmical for the material, as reflected in the price.
 
NSXHSC said:
One thing that cannot be argued is the durability.
The Fujitsubo SS exhaust is made of 321 grade stainless steel.
321 grade stainless steel has a higher nickel content which gives it better ability to cope with high heat stress. Currently the rest of the NSX headers available are made of 304 grade stainless. 321 grade stainless is also a lot more expensive than 304 grade hence the higher price for the Fujitsubo($2400-$2600).

For the Fujitsubo "Inconel" exhaust, the Inconel material has a very high nickel content, but primarily is used in only Formula 1 and other top racing series. Price is astronmical for the material, as reflected in the price.

I think I'd rather buy 6 replacement Headers than get one fujitsubo. :)
 
Thanks very much for all this info.
I was wondering, has anyone dynoed their NSX after installing headers & exhaut and then again with the Dali-chip installed ?
According to the Dali-site the Dali-chip in combination with H&E should give another gain of 10-15 HP, bringing the total up to about 32-35 HP.
 
how much HP gains are there on a 97+ NSX? I keep hearing that the performance gains are not significant.
 
The 97+ cars have OEM headers so I don't think the gain would be as great as the pre-97 cars. But still, Comptech claims +8HP by changing to a CT exhaust, and an additional +15HP by adding their headers to their exhaust, for a total gain of +23HP

On the Dali site, MJ says his gain was only +3. It's not clear if this is RWHP, or if this is with the OEM exhaust or aftermarket exhaust.

In the next month I'll be installing CT headers on my '00 and the Paddock exhaust, and I'll make dyno runs after each mod.
 
Could you guys also include whether the particular headers are CARB approved? I'd hate to have to swap headers in and out every time I get smogged.
 
Since we're on the subject, anyone have anything good, bad, or indifferent to say about DC headers? I've got a chance at a used set for $450.:confused:
 
spdntckt said:
Since headers dont mess with the cats or o2 sensors/etc - do they need to be CARB approved?

I remember reading somewhere that any changes up to the cats need to be approved. I thought just the exhaust didnt need approval?

Does anyone have the exact answer? Again, I'd hate to have to swap headers every time I need to smog it.
 
In the next month I'll be installing CT headers on my '00 and the Paddock exhaust, and I'll make dyno runs after each mod.
I would love to hear how that dyno goes, I'm sure you have been keeping up with my "book" on the Paddock thread. I gained 11-12HP with the muffler alone on my 1998. Another measly 1HP from a drop in K&N. I really want to know about headers, while I was watching my muffler install I noticed our stock "headers" look really restrictive because of the small piping Honda uses. Please let me know as soon as you do you install:D:D:D

BTW.....I'm editing this post now because I just went to Comptech's website and looked the headers up. As mentioned early (I didn't believe the post) they claim 18HP at the wheels on a 1995-1999!!!! How can they do that, I would love to see dyno numbers. I really think that's insane, bordering on "false advertising". I'm sure someone on this forum has to have dyno information. Maybe we can save PorkNBeanz $1500.00
 
I have a 99 and added headers and exhaust. No noticable gain from these two on the dyno for me. Dynoed same as stock. I can say that I added these for a supercahrger foundation, and in the end; I am not dissapointed. I agree with Jadkar about the comptech claims. Also discussed here
 
I have an early four series NSX video pack called the NSX Connection produced by an NSX owner from the early '90s. In one video, he compares horsepower gains from the Comptech headers, exhaust, and performance chip. The car was run before the mods to establish a baseline. Running the chip only produced a few horsepower at the top end and actually took away some at midrange. Said it wasn't worth the $500 price at that time. The exhausts available at the time (Comptech, Supertrap, etc.) were compared and produced about 5-8 horsepower. The Comptech headers gave about 20-23 more rear wheel horsepower with that modification giving the best performance gains. They liked the package, the quality/construction was good and the install went flawlessly. He compared the OEM headers to the Comptech and could clearly see that OEM were very restrictive and weighed a lot more too. The producer couldn't understand why Honda went with a heavy and restrictive header when they were trying to save weight everywhere else through the car. I believe the OEM headers weigh around 45 lbs. or so.
 
The producer couldn't understand why Honda went with a heavy and restrictive header when they were trying to save weight everywhere else through the car.
Well they fixed that in 1997, I just wished they used a larger diameter pipe.
 
Zipy said:
Since we're on the subject, anyone have anything good, bad, or indifferent to say about DC headers? I've got a chance at a used set for $450.:confused:

I would get the set for $450 if you can. That is a great price. if you dont want them, let me know and I will.
 


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