Car: 96' Acura Integra GSR 4 door with 00' GSR motor.

I have an accord piping on my car right now. And I got this 4 door piping that i want to put in so i can throw in an aftermarket header some time soon becuz the accord piping is cut and the cat is welded on and also the stock header is cut and re-weld to fit the piping.

So i borrowed a friend's GSR stock header (dont know what year gsr it came from, but its obd2 header) so i can put in the 4 door mid pipe, but then found out a problem on the flanges on the cat and the header. They line up but then the holes doenst match up. Any idea what year gsr header I'll need? or maybe its the cat? but then its the cat i had on my previous 00' gsr dc2.
I dont know much about piping, so go easy on me.

I'll take some pics tomorrow when its daylight and post it up.

 

Pics:

 

GSR header from 00 01 i think are the same as all ls no matter if its a four door or a two door. gsr header before that are going to be shorter all ls type r header from 94 up are the same gsr header from 94 to 99 i believe are shorter

correct me if im wrong

 

I saw a pic of the difference on here a few days ago. But what i want to know is what stock headers would fit properly for my setup. Because my motor is 00 and my gsr shell is a 96.

 

Anyone?

 

?

 

Doesnt matter what year motor, or shell for that matter (as long as it is a 94-01 Integra sedan). What matters is what header / cat you are using. That looks like a 94-95 GSR header.
The pre 2000 GSR exhaust is the one that is different. All 94-01 rs/ls/gs/se/ITR and 00-01 GSR are the same.

 

I just bought the mid pipe from a friend so im not sure what year it is. But the cat i have is from my 00 gsr, i think this is the problem. Also today I went to trade my rims and I ask the guy if he had a stock header and he gave me his old one for free becuz the top half was cracked. That header is from his 97 gsr i lined all the piping up and it fit but jux that the cat isnt bolted how its suppose to but atleast it fit and i can screw it in. I'll try to put it on tomorrow and see what happens

 

Oh dayum, I just remember now that the header i just got is obd1 becuz it doesnt have an o2 on it. Dayum.

I would rather go from the mid pipe, becuz i bought it already, all i need is jux the header and maybe an older year cat. just dont know what year header i need and what year of the cat i would need. Im thinking the mid pipe i got is 94-99 becuz the cat i have doesnt fit straight on the pipe, and the cat is from my 2 door 00 gsr.

 

Sounds like the cat may be the problem here then, you need a 94-99 GSR midpipe from the looks of things.

 

I'll look around and see what i can do.

 

Im probably gnna pick up a some wat dented itr replica header that deletes the cat tomorrow. If that fits onto my 4 door then im jus gnna go with that. Any info if it will fit?

 

In order to run the obd1 header you have, you're going to have to use an obd 1 sized cat. The obd2 cat you tried initially is too long to run with an obd1 gsr header.

From 94-99, the GSR exhaust manifolds were longer at the collector and mated with a short stubby catalytic converter.

In 00-01, the manifold design had a shorter collector section and mated to a longer catalytic converter.

The B-pipe never changed from 94-01.