Tubi vs. GruppeM V2 vs. Taitec GT

Joined
20 February 2000
Messages
1,318
Location
Irvine, CA, USA
It is almost 1 am and I just cleaned up the garage and myself after installing the Tubi and changed oil at the same time. Thank you Tino for organizing the group buy, and Larry G. and Larry B for your technical advice!

I've been in search for the perfect exhaust with the right sound and performance mix. After hearing a lot of positive feedback on the Taitec GT, I placed an order from SoS. A week (<100 miles) after the Taitec install, I swapped it out with a GruppeM Version 2. Today, 12 months (~1500 miles)later, I got the Tubi from Tino. So here it is.

Built quality:

Taitec - 8
The Taitec went on perfectly with no alignment problem. Shiny and simple.

GM - 9
This is an exhaust with top notch built quality. You can tell that every little detail were perfect. I can say this exhaust it "beautiful". If it didn't have an alignment glitch, it'll get a 10.

Tubi - 8
Although this is not a Japanese product, this is no second class citizen either. The entire exhaust is very shiney. The canister is compact. But the left side far left tip was lower than the rest.

Sound:
I look at exhaust like a set of speakers. They sing to you.

OEM - 6
It is like classical music. Great for cruising on a long trip.

Taitec - 5
Somehow, the sound just didn't appeal to me. It is equivalent to a garage band. (If you are a garage band member, I apologize! Don't send nasty me emails. Everyone has to start from small)
At idle, it is nice. It gets louder only when you step on it. Very ear drums friendly. I just didn't care for the sound when I let off the gas. Otherwise, exactly the sound level I like, but lack of the sound quality I was looking for. May be I should have let it break in a little.

GM - 9
Rock and Roll baby! During idle, it is smooth and is the loudest all around. This exhaust just screams with a high pitch tone. Combine with the shrill, it is out of this world. If you are looking for an aggressive and loud exhaust, look no further... this is IT! You'll startle yourself if you open it up in an underpass. Then you'll smile and say to yourself .... yeah baby!
There is a price to pay though. It has a slight booming sound as the engine drops from 2k to 1.5k RPM. I’d have given it a 10 without the booming sound. If you are on a spirited drive, you’ll never notice it. Neither would you if you are cruising at 80mph at a constant speed. Local driving…not as ideal. I noticed that I wanted to put the car in neutral as I approach stoplights.

Tubi – 9
It is like the 80’s funky jazz, Lee Ritenour comes to mine. Strong, dynamic, smooth, and you’ll never get tired of listening to it. Well at least I won’t. At high RPM, its pitch is not as high as the GM but very very sophisticated. I just had 5 miles on it. I’ll know more tomorrow. At idle, it is noticeably louder than OEM, but not as loud as GM. It is a consistent smooth burble through out the entire RPM range. No booming sound. Cruising is totally comfortable. WOT was actually quieter than 5, 6K. I also notice that knocking sound others have reported. In general, I am extremely happy with the sound.

Looks:
OEM – 2
Ugly!

Taitec – 7
Nice if you like a single tip design.

GM – 10
The big slightly angled quad tips are the best I have ever seen on an NSX. I used to like the RM, but it is not even close to the GM tips design. The big round dual canisters from behind show the car with balls. It matches its sound perfectly. You can spot an X with GM from far away. Love it!

Tubi – 9
The tips angled perfectly upward aligned with the valance. Quad tips are better looking than dual tips. The Tubi tips are smaller than GM, but they are double layered. The canisters are shiny but you can’t see it from behind. If you like the tucked in look, then you’ll love this one. I’ll miss the GM.

Weight:
I didn’t have a scale to weigh them and just by how bad my back felt.

OEM with cats – heavy as heck. Almost broke my back lifting it in and out of the box.

Taitec with cats – don’t remember, it is noticeably lighter than OEM, but what isn’t.

GM w/o cats – Since it bolts directly to the headers, it saves around 28lbs for not having the 2 cats.

Tubi with cats – The exhaust itself weighs about the same as the GM.

Performance: (no dyno runs, just seat of the pants feel)
Taitec – 4
I noticed/felt that the car was actually slower than with the OEM on. May be it just needed a few hundred miles of break in.

GM – 10
The first time I drove the car with GM, I felt a similar HP increase like the way I felt when I first installed the headers with OEM exhaust. So, some exhausts do give you noticeable HP gain! The car was happy and was breathing much better. The engine rev’ed smoothly when I start her up.

Tubi – 8
May be it is a combination of the functions of the cats and their weight. I felt the car lost some power comparing to the GM, but the engine is rev’ing quite happily. A light price to pay.

Summary:
All out aggressive sound and performance: GM
Smooth, macho and environmentally friendly: Tubi
To save some money with louder sound: Taitec
To save money with a quiet driving experience: OEM

Why did I sell the GM?
Booming sound and no cats (my daughters were complaining about the smell when I pulled into the garage)

I’ll post some pictures when I have time tomorrow. It is 2:30 am and it’s been a long day. One recommendation, if you don’t have strong upper body strength and are mechanically challenged, don’t attempt to replace exhaust by yourself. I have heard so many mentioned how easy it is. Well not to me. I have only paid myself $10 an hour to do the job. Hardly worth it, but I did enjoy the challenge and the quiet time without the kids.


[This message has been edited by CDube (edited 31 December 2002).]
 
wow! nice writeup. great since you've had such a variety of exhausts to compare from.

just got the tubi and id say ditto! not too loud, definately not quiet, definately not a squealing high end sound like so many aftermarket exhausts have. to me, it definately sounds like an exotic car now.
 
Mannnnn that sounded Hott ... i think im gonna get this exhaust now too

whos got the best price on the tubi right now ?

[This message has been edited by NyC NsX (edited 01 September 2002).]
 
There are about 12 NSX Tubi's left from the recent production of 30. There are no other in existence here in the US. If you need one please contact me before the end of Wednesday Sept. 4th as I will be out of the country Sept 5-21st and no one else in my company handles Tubi.
Thanks
Tino S.
 
Originally posted by CDube:
Why did it sold the GM?
Booming sound and no cats (my daughters were complaining about the smell when I pulled into the garage)

I have had the GruppeM v2 exahust on my car for about a year and a half now and have never experienced the strange odors you mention-- when I pull into the garage it smells the same as when I had the factory exhaust with cats.

I do however notice the booming sound you mention. At first I wasn't sure I liked this, but after awhile I've come to enjoy it-- it makes the car's engine sound bigger and works well to drown out the annoying pitter-patter sound of the NSX's valves. I also thought all my passangers would hate this sound as well, so I began asking everyone who rode with me what they thought. To my surprise nearly everyone has said they kind of liked that sound-- even my wife!

It is a loud exahust. If I accellerate hard going under an overpass it sounds awesome-- high pitched-- almost like a high reving motorcycle. Often at the next stoplight, the passangers in other cars will be turning around looking to see what made that noise. However it is not too loud as to attract a ticket from the cops. Several times I have mistakenly gone past a cop while making what seemed like a lot of noise to me. All they've ever done is stare at me and do nothing. So I feel the volume level of the GruppeM is near perfect.
 
BB,

You are right about how the high pitch sound is very addictive. The booming sound is very subjective. Just like someone said that the K&N cone filter gave him a headache, but I love it.

The good thing about the GM is that the more aggressive you drive, the louder it gets. The Tubi and Taitec are similar in a way that when you push it, it actually sounds quieter.

I came back from a drive this morning and my neighbor (a car lover) came out. I asked him how he likes the Tubi. He said he likes the GM better. Oh well....

Here are some of the pictures I took during the installation.

After I put the cats back on:
DC+headers.jpg


The GM V2:
Gm1.jpg

Gm2.jpg


Tubi came with sexy red fish net stockings on the tips:
Red+stocking.jpg


Tubi and GM side by side comparison:
Tubi+GM+1.jpg

Tubi+GM+2.jpg




[This message has been edited by CDube (edited 03 September 2002).]
 
Tubi label:
Tubi+label.jpg


Tubi tips:
Tubi+tips1.jpg


Tubi and the Y-pipe from the GM:
Tubi1.jpg

Tubi2.jpg


Left tips were off a bit:
Left+tips.jpg


Rear shot:
Rear+view.jpg



[This message has been edited by CDube (edited 03 September 2002).]
 
Right tip and the rear spat discoloration and a dime size burn on the valance from the GM:
Right+tips.jpg


Low rear shot:
Rear+view+2.jpg


You don't see the canister from behind:
Rear+view+3.jpg


Comparing with the GM:
DSCN0739.jpg


This one is from Randy:
prime_canyon_drive_2002_050.jpg




[This message has been edited by CDube (edited 03 September 2002).]
 
Originally posted by CDube:
I came back from a drive this morning and my neighbor (a car lover) came out. I asked him how he likes the Tubi. He said he likes the GM better. Oh well....

Chris, I've heard that the Tubi sounds better as time passes. Please let us know your opinion about it after a few thousand miles... and see what your neighbor says as well...
 
Originally posted by CDube:
I also notice that knocking sound others have reported

Can you please explain this knocking sound a bit more?

Also, how did you rectify the crooked left side tips?

------------------
Russ
'91 black/black
 
Originally posted by BB:
I have had the GruppeM v2 exahust on my car for about a year and a half now and have never experienced the strange odors you mention-- when I pull into the garage it smells the same as when I had the factory exhaust with cats.

Hello BB,

I agree with Chris (CDube) on the odor smell. There was a big difference for me between odors with the cats "on" and "off". I had the bypass pipes installed with my current exhaust (RM) for a couple of months but took them off as the smell was too strong and made my eyes tear. I thought perhaps there was an exhaust leak but it was not the case. I don't know if different gasolines contribute to different odors (whether you can smell on one car and not in another), but I only use Sunoco Ultra 94.

There are a couple of fellas here that already have the Tubi installed and I can comment on one of them. I was cruising on the middle lane of a highway and had him do a drive by on the left lane. My windows were "closed" and when he passed me, I couldn't believe how great it sounded! The exact high pitch I was looking for "without" having to remove catalytic converters to achieve it. It convinced me to get mine.

My Tubi has arrived (obrigado/eferestal, Tino!). I opened the box today and those red fishnet stockings immediately got my attention!
biggrin.gif
I will have it installed ~9/14 & 9/15. The knocking sound does concern me a bit. Like Russ has stated above, can someone please explain in as much detail exactly what the "knocking" sound is?

One thing has changed on the latest Tubi shipment and that is, the exhaust tips (including mine) are now 1/4" lower than the previous ones. Some people stated they were either too close to the upper valance or actually touching it. No problems with side to side, however.

Also, if anyone here is contemplating having any exhaust installed, you should get a replacement set of 10mm nuts & o'ring gaskets. Here is what you will need:

Part # --------------- Quantity --------- Price

90212-SA5-003 --------- 12 -------------- .31 each

18393-SH3-S00 ---------- 4 ------------ $6.31 each

I got mine from Eric at Niello (800) 472-7278.

Ciao,

Miléd

[This message has been edited by SennaPerfected (edited 02 September 2002).]
 
Originally posted by CDube:
BB,

You are right about how the high pitch sound is very addictive. The booming sound is very subjective. Just like someone said that the K&N cone filter gave him a headache, but I love it.

The good thing about the GM is that the more aggressive you drive, the louder it gets. The Tubi and Taitec are similar in a way that when you push it, it actually sounds quieter.

I came back from a drive this morning and my neighbor (a car lover) came out. I asked him how he likes the Tubi. He said he likes the GM better. Oh well....

Here are some of the pictures I took during the installation.

After I put the cats back on:
10682656503_0_ALB.jpg


The GM V2:
73682656503_0_ALB.jpg

26682656503_0_ALB.jpg


Tubi came with sexy red fish net stockings on the tips:
http://images.ofoto.com/photos249/5/56/36/40/87/0/87403656503_0_ALB.jpg[/ING]

Tubi and GM side by side comparison:
[img]http://images.ofoto.com/photos249/5/56/36/52/41/0/41523656503_0_ALB.jpg
23523656503_0_ALB.jpg



[This message has been edited by CDube (edited 02 September 2002).]

What model Taitec did you try, and whats the price on the Tubi?

------------------
Wayne
 
Chris had the TAITEC GT Parallel. This exhaust is TAITEC's entry level unit. Unlike the other exhausts, and as Powered mentioned, you must allow this exhaust to have a break in period. That being said, I prefer the sound of the GruppeM and other TAITEC exhausts much more than the GT Parallel.

However, for people that don't have the $2400+ (GruppeM) or $1400+ (Tubi) amount to spend, the GT Parallel at $885.00 is an attractive buy for the price.

In the sound department, I think the TAITEC JGTC Parallel (lower pitched) and GruppeM (higher pitch) exhausts are the best.

Regards,
-- Chris

------------------
Revolutionize your NSX with ScienceofSpeed
www.ScienceofSpeed.com | [email protected] | 877-863-4520

[This message has been edited by ScienceofSpeed (edited 02 September 2002).]
 
Originally posted by ScienceofSpeed:


In the sound department, I think the TAITEC JGTC Parallel (lower pitched) and GruppeM (higher pitch) exhausts are the best.

Can you please explain how did you reach that conclusion ? I thought sound was very subjective; some people think no muffler at all sound the best. Some people think LL Cool J sound better than Pavarotti. We never claim any proficiency in sound rating; that should be left to the consumer and his personal taste.
.
 
Originally posted by SennaPerfected:
I agree with Chris (CDube) on the odor smell. There was a big difference for me between odors with the cats "on" and "off". I had the bypass pipes installed with my current exhaust (RM) for a couple of months but took them off as the smell was too strong and made my eyes tear. I thought perhaps there was an exhaust leak but it was not the case. I don't know if different gasolines contribute to different odors (whether you can smell on one car and not in another), but I only use Sunoco Ultra 94.

Hmmm... Interesting. The exhaust on a car should not normally be usually stinky, even without cats. What did the odor smell like? Did it smell like sulfur (i.e. rotten eggs)? If so that might indicate bad gas (too much sulfur in it) or perhaps your car is running too rich.

My NSX with cats off smells no different than my CRX (with its cats on). Perhaps I don't have a very sensitive noise, but nobody else has complained or commented about odors from my car.

And of course Chris would say the Taitec JGTC and GruppeM sound best-- he sells them!
wink.gif
However, of the exhausts I have heard, I agree with him-- those are among the best available. The Taitec sounds awesome at idle and lower rpms crusing around, easily beating all others I have heard in this area. However, at high rpms I prefer the more agressive higher note of the GruppeM. Anyway, I don't think he's giving bad or biased advice.
 
Conrad, I know I should give it some time. In order to get a few thousand miles, I'd have to wait for a couple of years. I just don't have the chance to drive it more often.

Tom, unfortunately, I didn't have a scale at home to weigh either one of them. Tino, do you know?

Russ and Miled, I'm not sure if I can call it knocking. It sounded like the exhaust is pushing water around in the canister. A little like gargling. Like gaalaa gaalaa or golog golog.
redface.gif
)

I was not able to correct the crooked pipes on the left side. I looked under the car again just now and I think the way they (Tubi) adjusted the valance clearance problem was to push the pipe down from the exit (center)point of the canister wihtout leveling the tips. Not sure how to restify it. My neighbor said use a broom stick. There is no way in hell I'm going to try that trick. Any other suggestions?

My bought the same parts that Miled has suggested. I paid about the same price as you. It was a 20% off list. Some dealers actually mark up over list. Tustin Acura quoted me $8.80 with no discount and South Coast Acura quoted me $7.52 plus 20% off ($6.02). So beware...

Kings, Chris (SoS) is right. I got the GT parallel, which was the only parallel available at the time of purchase. The only other one was the center exhaust. The group buy price for the Tubi is $1695 from Tino.

BB, not sure about the smell, but it is definitely not sulfur. May be my car was running a little rich. I was told by Larry G. that it is safer to run it rich than lean. Now that the cats are back on, the smell is gone. Of course the new smell would have something to do with the new exhaust system.

Over all, I think the Tubi is the best compromise for me at this point. But then again, I heard that GM is coming out with a Ti version soon.... Nah, I'll stay with the Tubi.

Chris, too bad that I haven't ran into anyone with the JGTC parallel. May be I'll change my mind. Last time I took the advice from the Taitec owners and got the GT. My advice to anyone looking for an exhaust is to actually listen to it in person, or better yet drive one. Recordings are just not the same.




[This message has been edited by CDube (edited 03 September 2002).]
 
Originally posted by bboxer:
Originally posted by ScienceofSpeed:


In the sound department, I think the TAITEC JGTC Parallel (lower pitched) and GruppeM (higher pitch) exhausts are the best.

Can you please explain how did you reach that conclusion ? I thought sound was very subjective; some people think no muffler at all sound the best. Some people think LL Cool J sound better than Pavarotti. We never claim any proficiency in sound rating; that should be left to the consumer and his personal taste.
.

It is subjective, that's why I said "I think"
wink.gif


Chris -- there are quite a few with the JGTC Parallel running around SoCal now (it is available in both center-exit and parallel-exit forms now. However, if you appreciate a quieter exhaust like the Tubi, than this would likely be a more complimentary exhaust.

Cheers,
-- Chris


------------------
Revolutionize your NSX with ScienceofSpeed
www.ScienceofSpeed.com | [email protected] | 877-863-4520
 
Originally posted by ScienceofSpeed:
It is subjective, that's why I said "I think"
wink.gif


Chris -- there are quite a few with the JGTC Parallel running around SoCal now (it is available in both center-exit and parallel-exit forms now. However, if you appreciate a quieter exhaust like the Tubi, than this would likely be a more complimentary exhaust.

Cheers,
-- Chris



Would you say that sound level of the Tubi and the JGTC are comparable? How much quietier would a GT Lightweight Parallel be?

------------------
Wayne
 
Doesn't look like the images are showing up.
If you'd like to see the exhausts, go to:
http://photos.yahoo.com/bc/silvernsx1979/lst?.dir=/Silver+NSX&.view=t

and click "show all" to view all pictures.


Lud,

Could you tell me why the pictures came out fine after I posted it and now it doesn't work any more? The GM rear shot was from the same site as the rest, it came out fine. Am I exceeding the limit posting that many pics? I tried to get all in one post and got an error message, that's why I split them into 3 posts.


[This message has been edited by CDube (edited 03 September 2002).]
 
Originally posted by kingsnsx:
Would you say that sound level of the Tubi and the JGTC are comparable? How much quietier would a GT Lightweight Parallel be?


The JGTC exhaust is louder than the Tubi. You can see a relative comparison between exhausts we offer here (click exhaust comparison):
http://www.scienceofspeed.com/products/exhaust_airflow_products/NSX/exhausts.asp

------------------
Revolutionize your NSX with ScienceofSpeed
www.ScienceofSpeed.com | [email protected] | 877-863-4520
 
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