Anybody know if it's 2" or 2.25"? Thanks

 

2.25

 

Small enough to get POUNDED by my 2.5" jdm dc, 2.5" carsound and stock exhuast. Right, Nate?

Then again, I don't have a 60,000 watt system in my trunk weighing me down.
Just playin'.

The comptech header/exhaust ID is 2.25".

 

Comptech has a new header correct? The one that is supposed to be a copy of hytech w/ a 2.5" ID, I think... is that on there website yet and how much does that go for? anybody?

 

Dunno. But the hytech is supposed to be the best header. (That's hearsay)

 

Yeah they do have a new 4-2-1 with a 2.5" collector. It also replaces the cat/test pipe or whatever you have and runs straight to the exhaust. Retail is $1250.

I have this header (regular 2.25") on my b16 and it makes great midrange but I want to know how you guys with 1.8's like it b/c I'm about to have one.

 

TypeR#1111 has the whole exhaust system, I think. Including the 2.25" header. He posted above, hopefully he looks back and can give a review on it. Personally, I like the 2.5" ID better. It was a significant increase from the stock header/cat. If you aren't crazy about Comptech, there's Toda, and a slew of other 2.5" ID headers with excellent performance.

 

Actually the comptech header collector is 2 inches, not 2.25"

The R header is the exact same header they market for the LS.


Comptech's new "b-series" race header is just a copy cat design of the the Hytech header. They basically let Hytech do all the R & D and then pretty much copied it. Original.....way to go guys.

On an ITR with just mild bolt on's (i/h/c/e) the Comptech header and exhaust should be okay. Some people say that 2" collector is too small for the heavy breathing C5, but check out how the "peuny" 2" collector kept up vs. the 2.5" guys in The Great Header test.

If you going for more serious modificaitons.....then 2.5" collector and piping will be your best bet.


[Modified by BlueTeg, 3:46 PM 10/3/2002]

 

To be honest, I like my full Comptech set-up a lot, but am starting to consider changing to a JDM 4-1 2.5" header next summer. With the Comptech setup i'm using and some v-afc tuning I was able to put 172 to the wheels. Comptech makes great quality products, but for their price you can find a 2.5" setup and squeeze more power out of the C5. My comptech header and exhaust will probably be up for sale by the end of winter, so if your interested let me know.

 

All USDM header collectors are 2". Including comptech.

 

Isn't the JG/Edelbrock header 2.25"? Do you guys think this header would be worth $150 over the Comptech?

 

my 5zigen header is 2.25. i thought it was the only one with that size, but im pretty sure the comptech is 2 tho

 

ttt

 

I did some research and I was wrong...the Comptech header does have a 2" collector and not 2.25" like I previously stated. Sorry for the false information

 

So what about the JG/Edelbrock collector?

 

Standard bolt on header is 2" while the race version has a 3" tailpipe.

 

true, but the Great Header Test isn't that accurate. none of them were tuned after the header was install. with a vfac or engine management, hp would differ from the test.

i called it "The Great Un-tune Header Test"

 

While I agree w/ you that it was lame that all of the seups were untuned. The Comptech still held its own.

On a tuned R.....I suspect that the difference between the 2.5" collector setups would have been more substantial.

 

you may call it that, but the point of the test was to compare bolt-on out of the box headers to each other, which is exactly what it did. Of course fuel tuning each header after install would yield better results, but that wasnt the point was it. When anyone tests components such as intakes or exhaust, they never do fuel tuning also. this would obviously change the results to not be just the gains recieved from the bolt on component. I saw kick *** gains on my R when i installed my JDM DC header, and even better results when i installed mike's(SMSP) cat. I expect even better gains and a flattening of my torque curve when i install my VAFC, just as i saw in my GSR. Point being, the test was highly accurate for what it was testing; what kind of gains will you see from stock to a bolt on header, with 10 header types tested. anyone here will see similar gains if they just install a header. The C5 loves the 2.5 collectors.

 

Is this inner diameter or outer diameter?

 

outer diameter