Originally Posted by Asahi
There is? Got a link, I'd like to see more about it. I know they make a sweet 4-2-1 US sized collector header bhut I've not seen anyone mention a 2.5" collector option or any performance from it.
Trey
http://www.inlinefour.com/apgtexman.html
Go to the pulldown menu and there's an option for "98-01 JDM ITR 2.5in collector."
Originally Posted by v-teg01
Can u show me a picture of the OEM JDM 4-1 header that would be great also where could i find one? Do u agree that i could use a better header? So the DC header i have has smaller piping then the OEM JDM 4-1, and no collector?
Every header has a collector. The collector is simply the section of pipe where all of the runners merge into one. Any header that is designed to bolt up to the stock catalytic converter of a US-spec Honda will have a collector that is 2.25" in diameter or smaller.
The '98-'01 JDM ITR has a header with a 2.5" collector from the factory. There are also aftermarket headers available that have a 2.5" collector. To really get the full benefit of the larger collector, you need a 2.5" cat and a 2.5" exhaust; however just running the header will still provide an incremental improvement over a 2.25" version.
This is what the OEM JDM ITR header looks like.
