K Series Parts 02-06 RSX / 02-05 Civic Si O2 Sensor Extension
Part Number: O2EXT
Inside Continental United States
Earn 0 reward points. Learn More
Will It Fit Your Vehicle?
This is a 10" 4-Wire extension for your O2 sensor.
|Brand:||K Series Parts|
18 reviews for K Series Parts 02-06 RSX / 02-05 Civic Si O2 Sensor Extension
4.944444444444445 out of 5.0
12/1/2014 by jacob
Easy to install! Perfect for race headers! Thanks K-Series parts... Installed on ep3
2/28/2014 by Kevin R.
The perfect fix for running anything other than stock exhaust. Use this on an EP3 when installing RSX-spec exhaust or turbo downpipes that don't have the O2 bung in an ideal location. Kseriesparts delivers another great product as always.
1/29/2013 by Allen
If you are planning to do exhaust work or install headers, do yourself a favor. Get the extension to make your job essier and complete. As others said. Perfect fit and a prrfect length.
1/6/2012 by Leod
Worked out fine. did a jdm type r conversion for my exhaust system, and this was the perfect lenght. no problems. :D
6/7/2011 by Chris
CRSX o2 Sensor Extension
Great fit, worked perfectly for my ep3 with a type-s race header
2/28/2011 by M.
Great fit, easy install!
Great for the aftermarket headers that don't exactly fit OEM specs.
10/25/2010 by Jim Moody
Easy to install. No issues!
3/29/2010 by Justin
the install was as easy as it seems and it worked great with my aftermarket exhaust and have had no issues thus far...
3/9/2010 by Dan
Easy plug in, and it works...no issues with this part whatsoever
3/5/2010 by Mark
It is what it is
10" extension, installed easily, no problems. what else is there to say? lol
1/19/2010 by KENNY YAU
No problems whatsoever. Helped me out a lot since I have a race header!
11/19/2009 by J
Good length for most applications
I used this for the installation of an ITR on my base RSX. The secondary sensor with the 10" extension just barely reaches with no slack in the line. Should be ok, but I'm always worried the wire might get damaged after one good bump. Would be nice if it were a 12" extension instead of 10". Other than that, quality and fitment are great!
8/26/2009 by Tim Fritz
Harness Extension used on Secondary o2 Sensor on Kidd Racing Header Install
I used one of these harness extensions when installing my Kidd Racing "Krusher" on my '03 Type S. The extension did all that it was made to do and fit perfectly, no hassles. It wasn't absolutely necessary to run this on my secondary o2 sensor, as I could have just unclipped the female end of the harness from the retainer on the base of the firewall but I dislike doing things half assed so I opted for this extension and it worked great. By one now.
12/10/2008 by Brian
A must for race header install
I bought one O2 extension when I was installing my DCRH. The fitment was perfect and gave me no problems. In retrospect though, I wish I had bought the second one at the discounted price because the O2 sensor without the extension was barely long enough to work. I would've felt more comfortable using extensions on both O2 sensors. I say by 2 if you are in doubt. It'll save you time and grief.
9/20/2008 by lmo
plugs up perfect. works exactly the way its suppose to. i did not know u get a discount on your second one i bought them seperate and did not get a discount =[
9/4/2008 by Zack Zweifel
First, I am amazed by how fast CRSX sent me these extensions. I bought two of them because you get a discount on the second one and I am extremely satisfied with my purchase. They fit perfect and gave us plenty of room to feel confident about installing the new oxygen sensors with no worries. Thanks CRSX!
7/28/2008 by Hamburglar
Fits perfectly. Now I can have my Wideband with display and my stock O2!
6/19/2008 by stokelessdc5
Great product. Everything plugs up perfect. A must for race headers. Makes life a little easier.