Will a stock USDM ITR exhaust manifold (header) mate correctly to my stock '96 LS cat? I'm concerned about the outlet collector diameter being too large to properly seal with the smaller diameter LS cat inlet. Would this be the case or will this mod be more or less a direct fit? Thanks in advance for your responses.

BTW, the car is a mostly stock 2dr LS.

 

it'll fit

 

So it should fit without modification? Does that mean that the collector diameters are the same? Thanks for the response.

 

Collector diameters are the same, as are teh lengths of the 2ndary runners and collector.

Flange bolt patterns are also the same.

And, all USDM GenIII Integra primary sections are identical.

No worries. If you're still skeptical, talk to Brandon Chun....I sold him one a long time ago and he's used it for a while.

 

Bolt on affair. It's really easy.

 

Is a stock USDM Type-R header comparable in gains to say a DC?

 

So, you're sayin that a Type-R header will bolt onto a '98 Teg perfectly, w/o anything going wrong? or did i miss something?

 

What model teg?

The ITR header will fit the following:
'00-01 Integra GSR
'94-01 Integra RS/LS/GS

 

It will fit fine without any modifications. The only part that doesn't fit exactly is a lower bracket which you can take off or use a longer bolt to make it work. Otherwise it should be a bolt on affair.

 

Thanks for all the replies guys. I just picked up the ITR manifold from a local HT member. I also got a ride in his ITR as part of the deal!

 

why do you want a usdm itr headder for? is this for replacement or upgrade?? if you think upgrading your ls headder to an usdm itr headder is going to give your power your wrong!!!! Fact is no matter if its a ls, gsr, or type r they have the same stock headder. They all have to pass emission in the states.. go buy yourself a dc or jdm itr headder..trust me your wasting your money..

 

hey xgsr00. This is no way a big power gainer. This was a cheap way for a minor upgrade. If you're saying that stock LS/GS-R and Type R manifolds are the same then you're an idiot.

 

DO MA!!!...like i said.. IF your looking for power than skip the usdm stock headders, since they're all 4-2-1 and are regulated to pass emission.. but if its just for replacement than go ahead..

 

I realize that this isn't going to make a marked increase in performance but for a low cost upgrade I think it is well worth it considering I will be getting rid of my stock, rattlin' heatshield, manifold for the R model one. Yes, the 2 manifolds ARE different. The secondary runners are mandrel bent on the R manifold and they are longer than those on the LS. To me, if the stock ITR manifold is designed to support 195hp I'm sure it couldn't hurt my otherwise stock (engine-wise) LS at 140hp. Yes, if I wanted to gain some more serious performace I would have gone with an aftermarket header (and spent an extra $300 dollars to get an additional 1-3 hp). Once I get around to installing the manifold I will do some quarter mile runs to determine what, if anything, was gained by doing this 'upgrade'.

 

Fact is you were wrong.