So I place an order for some parts from Kteller.com, and pricing was OK... shipping was expensive, but OK... but the parts just dont seem to match up too well. I "knew this was gonna happen" because this is the second cat I have constructed for my car and it was similar to this.

I bought these items:

2.5" 3bolt flange...
http://www.kteller.com/store/p...d/130

JDM 2.5" collector flange...
http://www.kteller.com/store/p.../1065

Section of 2.5" stainless pipe...
http://www.kteller.com/store/p...d/591

Here are the measurements of the products themselves:


A bit too big at 2.65", the SS piping has 1/16" of play all the way around and will need a shim before welding or a really thick weld.


OMGoodness... 2" ID, this is gonna need to be sliced up, I mean what happened to 2.5"... at least 2.36 would be nice to match the JDM header.


Had to modify contrast on the ruler because the lines were almost completely washed out by the camera flash. EDIT: It comes close to 2.5" OD but ID is too small with the 3/32" thick piping. Only 2.25"


NOTICE HERE THOUGH... that when you buy a catalytic converter it is right on the money at 2.5" ID.

I mean I can make all of this stuff work out with little mods... but I sholuldnt have to. They need to make like a standard of 2.5" or 2.36" that gets hooked up on everything so it will mate right up or at least butt right up.

And Im not trying to bash Kteller.com, I mean it is like this at alot of places... but it would be nice if they could advertise the REAL measurements of their products.

For example... If you needed batteries and the package said "3volts" but then when you put them in they were only 2.5volts and the 4 of them didnt add up to the 12volts your device needs... it would blow.


Modified by 2G0S0R1 at 2:35 AM 10/1/2005

 

Wow thanks you man for showing us this info. I'm going with the same route to get all 2.5 part..from carsound cat to flange. Hmm I guess I have to look careful from now on.

 

No prob, I always post stuff up for others when I feel that it is info that would have helped me previously.

 

exhaust specs are measured in OD....so try measuring that way.

 

I went through hell when I ordered a car-sound converter from them. The first time they sent me a converter which was 2 in. to short for my LS. They then had to remake a converter for me which was 2.5 in. on the header side and 2 in. on the exhaust side. I was like wtf.

Could you imagine how pissed off I was? You would think a company should know the specs for something they sell, but I guess not.

 

I can't say anything about those flanges. But the exhaust is 2.5 OD and the cat is 2.5 ID. That's about par for the course.

 

Which exhaust are you referring to? Not the piping right, cuz it is less than 2.5" OD

And yeah, the cat I am happy with. I bought that from rpmoutlet.com.

KB12: Exhaust specs obviously are not ALL measured in OD, as I have proven here.


Modified by 2G0S0R1 at 11:45 PM 9/30/2005


Modified by 2G0S0R1 at 11:46 PM 9/30/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2G0S0R1 &raquo;</TD></TR><TR><TD CLASS="quote">Which exhaust are you referring to? Not the piping right, cuz it is only ~2.36" OD

And yeah, the cat I am happy with. I bought that from rpmoutlet.com.

KB12: Exhaust specs obviously are not all measered in OD, as I have proven here.</TD></TR></TABLE>

Exhaust piping is indeed measured by OD. In the photo you posted, you appear to have measured from the inside of one edge of the piping to the outside of the other edge, thus giving a false measurement.

As for the 3-bolt flange, it is most likely sized in order to weld to the outlet of a cat, which as you noted, measures 2.5" ID. If being installed on exhaust piping where it would be bolting up to a similar flange on a cat, it would be a good idea to expand the 2.5" OD piping to fill the opening in the flange, therefore making a smooth transition from the cat's 2.5" ID outlet to the exhaust's 2.5" OD piping.

I do, however, agree that the 2-bolt flared flange does not look ideal, and almost appears to be the wrong part for the application.

 

Are you refering to the measurement of the piping? I measured it form the inside to inside, and got 2.25".

It should be 2.36 ID if it is 2.5" OD piping with a 1/16 thickness. As you can see it isnt, its only 2.25.

You are right though if you look at the pic that way... but I was trying to show the 2.25" ID(which isnt a false measurement), not the whatever it is OD.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">

Exhaust piping is indeed measured by OD. In the photo you posted, you appear to have measured from the inside of one edge of the piping to the outside of the other edge, thus giving a false measurement.

As for the 3-bolt flange, it is most likely sized in order to weld to the outlet of a cat, which as you noted, measures 2.5" ID. If being installed on exhaust piping where it would be bolting up to a similar flange on a cat, it would be a good idea to expand the 2.5" OD piping to fill the opening in the flange, therefore making a smooth transition from the cat's 2.5" ID outlet to the exhaust's 2.5" OD piping.

I do, however, agree that the 2-bolt flared flange does not look ideal, and almost appears to be the wrong part for the application. </TD></TR></TABLE>

this is very close to 100% accurate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mastamind &raquo;</TD></TR><TR><TD CLASS="quote">I went through hell when I ordered a car-sound converter from them. The first time they sent me a converter which was 2 in. to short for my LS. They then had to remake a converter for me which was 2.5 in. on the header side and 2 in. on the exhaust side. I was like wtf.

Could you imagine how pissed off I was? You would think a company should know the specs for something they sell, but I guess not.</TD></TR></TABLE>

not sure bout your order, but when you place it, it clearly says to list the length, and flange type you need. daily we can do 4-5 of the same car (applications) and its not uncommon that 3 of the 4, will all be different. based on swaps, header brands, types, downpipes, compainess, exhaust, jdm/usdm, etc it will vary each and every time.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kb12 &raquo;</TD></TR><TR><TD CLASS="quote">exhaust specs are measured in OD....so try measuring that way.</TD></TR></TABLE>

almost 99% if not all piping in general is done in OD, not just exhaust but almost everywhere you look. its a standard rule to measure OD, as ID would vary based on thickness or thiness and type of material.

as to the jdm flange, actually your measuring it form the wrong side. if you look and measure form the other side that is actually welded to the piping. they have a very small lip that is for oem fitment and that is then normally cut or kept (thinking of inner flow, it wouldnt effect it as it transitions that direction). those are ordered directly from japan and come from the standard oem facility. not like we make them


if anyone else needs' measurements or has questions, feel free to pm us. as i can take pictures or help in any ways possible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KTeller8 &raquo;</TD></TR><TR><TD CLASS="quote">
not sure bout your order, but when you place it, it clearly says to list the length, and flange type you need. daily we can do 4-5 of the same car (applications) and its not uncommon that 3 of the 4, will all be different. based on swaps, header brands, types, downpipes, compainess, exhaust, jdm/usdm, etc it will vary each and every time.
</TD></TR></TABLE>

It's not a big deal as the converter is still functional and doesn't throw a CEL after a years worth of use. The customer service that you supplied was exceptional as well. I just found it odd that this specific converter was 2.25' on the header side then tapered down to 2'. I was informed that the cat is the only thing measured by ID.

Would I do business with you again, probably, as your customer service was good.

 

Since you are a fabricator you might want to do some research on nominal pipe and tubing sizes before you bitch. Do you actually think that there well be special material made just for your application, NOT! That is why there are machines to swage tubing and pipe to fit. Looks like you are using SS, mild steel, and aluminized parts? SS tubing and Aluminized piping are measured different from each other. Go see a fabricator or muffler shop and stop whining