Yo

[tmracing83]

What size ?


01 gsr stock header, where header meets exhaust what size is it


2.25 ???


2.50¿¿¿

Something different


What size is header where header meets exhaust.

[tmracing83]

!????????

[silverDA]

2
.
2
5
/

[tmracing83]

2
.
2
5
/




How sure are u my sir....

[tmracing83]

I think its 2.50.





How sure????¿¿:thinking:

[tmracing83]

I'm buying Evo 2 Greddy exhaust tomorrow. the exhaust is 2.50 all the way. But I have stock headers and vteckidd told me the stock headers are 2.25 where they meet exhaust


But dude I'm getting of from says it will fit fine. .25 of an inch is enough for mr p not be ok with.



What the opinions people

[tmracing83]

??????

[tmracing83]

Ppl answer me! I know someone knows

[silverDA]

your going to need a 2.5 flange welded to your manifold bro/

[DustnU]

Buy a REAL header!!! VTECKIDD racing.

[tmracing83]

Buy a REAL header!!! VTECKIDD racing.




If I had the money I would do it now. I've already talked to him. I just wonerdering if I can put the exhaust on before I get some headers. Eaithrr bisimoto, or kid rcing..

[tmracing83]

your going to need a 2.5 flange welded to your manifold bro/




My exhaust manifold? Or where on the mNifold. Imma noonb!!! So please explain. I'd love to learn everything I can! Would much would the flange be at a shop? 20$ tops right?

[DustnU]

It's on the very end of the manifold. where cat bolts up

[silverDA]

most muffler shops dont sell flanges i would check ebay,jhpusa,inlinefour.there around 20dollars and dont forget the donut gasket too you will need this also.and or you can have them straight weld it together but i would not recommend/

[Tech5]

2.25

[punkr6]

2.25

:goodjob:

[Tech5]

A GOOD exhaust shop makes flanges!

[tmracing83]

A GOOD exhaust shop makes flanges!


Where's a GOOD exhaust shop south of atlanta?



I need a test pipe too.


I bought the exhaust

[tmracing83]

He said they bolted right on no problem. But he said I need a test pipe. He said that after I told him I have a bad cat

[PRO®]

He said they bolted right on no problem. But he said I need a test pipe. He said that after I told him I have a bad cat

is your county an emissions county?

[TommyD1919]

The stock manifold is 2.25, but as you know now the greddy exhaust is going to go from the back of your cat not all the way to the manifold.. since its a 01 you have a secondary o2 sensor. If you have to get emissions tested then you pretty much have to find a cat. if you don't then you can get a test pipe or clean out your current cat and use either a 02 simulator or a couple of spark plug defoulers (google) to get past the o2..Both of which is not legal and for off road use only.

But since you cat is already bad you could just bolt the exhaust on and go until you figure out what you are going to do.

[tmracing83]

is your county an emissions county?






ROCKDALE SON!

[tmracing83]

The stock manifold is 2.25, but as you know now the greddy exhaust is going to go from the back of your cat not all the way to the manifold.. since its a 01 you have a secondary o2 sensor. If you have to get emissions tested then you pretty much have to find a cat. if you don't then you can get a test pipe or clean out your current cat and use either a 02 simulator or a couple of spark plug defoulers (google) to get past the o2..Both of which is not legal and for off road use only.

But since you cat is already bad you could just bolt the exhaust on and go until you figure out what you are going to do.





I no something hooks up to the cat but I also have a piece tag attaches to the header soooo I'm confused.





Sry I'm such a noob