mr_munro

Hi

Thinking of getting this header for my DC2R, it is the 4-1 RMF Rep (RMF Style header w/ test pipe). My current header has been dented/scraped.

Has anyone fit this on their DC2R because I have a few questions:

Do i need the test pipe?
Do i need to extend the o2 sensor wires? if so by how much because I notice you can buy extensions from 16-33" long.
Any other installation issues I should let the exhaust shop know about? I am aware the radiator fans and shroud may need to be trimmed.

I have a fujitsubu power getter system with aftermarket header (no idea on the brand, but looks like JDM ITR copy) installed currently, I will be getting the work done at an exhaust shop so they should make it fit to my current cat quite nicely, (unsure if it is a high flow cat or stock cat).

Thanks.

mr_munro

anyone?

itr#1334

iTrader: (2)

I had a real one. Everything for fine but I have a t1r cat back. The ac fan shroud needs to be trimmed about an inch or less.

94eg!

iTrader: (2)

You will need do the following...

- Trim Fan shroud (and possible fan blade tips of you have a non OEM radiator)
- Probably Remove the cap on your clutch slave cylinder (I had to) cause the nipple is too close
- Trim your lower splash shield to make room for the 4 pipes
- Add a 2.5" flange to your stock CAT if you don't have a 2.5" CAT
- Extend your O2 wires

Here are images of mine in an EG. Should be similar. BTW I have problems with this thing sucking fresh-air if I park the the car for only a few minutes (short cool-down). I think I get the O2 sensor CEL because extremely low throttle angles (vacuum) draw air into the exhaust stream. It only happens on light-throttle deceleration down-hill. I personally think the flange is not sealing well at the head, but it really could be anywhere. I was instructed to use two gaskets. I've tried one gasket with a little copper RTV, and even copper RTV at the slip joint.....but it still happens. :\

mr_munro

Thanks for that...by how much will the o2 wires need extending? Will something like this do? Honda O2 Extension Harness Acura 4 Wire Sensor CIVIC Integra Prelude Accord CRX | eBay

94eg!

iTrader: (2)

That would be more than enough wire. I think it was something like 6 inches.

mr_munro

What about flywheel cover? I heard I need to buy a VTiR/GSR one as the the ITR one wont clear the header?

B serious

iTrader: (1)

IIRC, I used the O2 sensor from a 1998 Civic EX. Same sensor part number...but with about 6" longer wires, and significantly cheaper than an Integra part. I bought a NTK or Denso direct fit for $60 or so. Rockauto or sparkplugs.com

If you DON'T want to buy a new sensor....then extending O2 wires is not a good idea. Buying a sandwich extension is a better idea.

I had to trim the eff out of my fan and shroud on my stock radiator. I then went to a fluidyne radiator and slim fans (with shroud)...and had to trim the slim fan guard.




I used the flanges from the 2.5" test pipe that came with the kit ...and had them welded to a 2.5" HFC. And I ran it to a stock catback.

94eg!

iTrader: (2)

Mine clears the ITR transmission brace with ease. The collector is positioned right after the bend so there is pleanty of room. This was a major selling point for me.

Honestly the only option that fits/works better is the Toda or Toda replica....but they don't look nearly as cool in the engine bay.

mr_munro

Thanks for the info, yea i ended up buying a 12" extension just in case...you had no issues with the flywheel cover ? Also, what gains did you notice with the header bolted on?

B serious

iTrader: (1)

I don't remember doing any thing at all to the cover.

I noticed a good bump in midrange and top end....but never dyno'd it.

The only "complaint" that I had was that my clutch fluid got overheated once or twice after a very long/hot track day. I guess you could wrap the portion of the header that comes close to the slave cylinder in something that traps heat.

mr_munro

I've got the o2 sensor extension. Noob question but which sensor needs extending...I understand there is one on the cat and one near the header collector?

94eg!

iTrader: (2)

The one in the collector of course.

JDM-EJ698

I have this header, but I haven't had a chance to install it. Good luck with install.