OBX Header for KA24E installed pics/info

[deviousKA]

Ok everyone ive been wanting to post this up for a while. I found lack of info on the new obx header when i was deciding on buying it. For anyone that is interested here are some pictures.



notice the header is definately stainless, my engine's exhaust gas temperatures are probably a bit higher than normal at the moment, so colored results may vary



Heres another, and you can see the main drawback of the header imho. The o2 sensor location puts it right up against the firewall, i had to bash mine in a bit for some clearance, brutal. This isnt so bad, and may not need to be done, but the o2 sensor cannot be installed/removed without it.

Overall i am very pleased with this header. The exhaust flanges fit up nicely, clearance of steering arm is good, egr tube locations are good (although mine are deleted, i did check this). The header does come "close" to the block/transmission and floorpan of the car, but there is ample clearance. I have not yet checked how much total heat this is going to put out, i may need a heatsheild above where it connects to the rest of exhaust system

I have not had much driving time with my current setup, but first impressions are very good. Exhaust note is very nice, i will add further comments in the future. Please ask any questions if you are interested in this header!!

btw. i apologize for large pictures

[EnzoRWD]

nice writeup, and REALLy nice bay. soo cleankeep on rockin that KA-Enzo

[Silent Drifter]

good deal.

[pinoysurf]

Is there just one O2 sensor in the S13? And does your check engine light stay off? Ive been looking for some headers for my S14 but havent really found anything that looks very compatible considering the S14 has 2 O2 sensors and 2 cats.

[Altiman94]

only one o2 sensor in the ka24e, not sure on the ka24de. I am also looking to purchase this same header, glad to see that there are no major fitment issures, good write up.

[deviousKA]

well, i plan to add some more comments, but the car is still parked. My check engine light does not come on, o2 sensor is in same basic location.

The obx nameplate falls off after a couple days, i looked under my hood yesterday, and it was dangling by one tack weld.

oh and another thing i should note, the 2nd primary blocks one manifold bolt slightly (you just cant get it with a torque wrench). I just torqued the rest, and guestimated same torque with an endwrench.

the header mounted to the stock cat nicely, my only concern is with heat on the floorboard. I may have to put some thin heatsheild above it.

[Peabody]

What is that conector on the 2nd pipe from the front next to the stearing rod? On the header I have now I had o dimple in that tube so that the knuckle would not hit it when you turned the wheel.THANKS

[deviousKA]

that connector that is under the header and on the 1-2 pipe is the connector for the egr/black box system that is usally on the driverside inner fender. None of the peices of my header are dimpled for clearance. I have plenty of clearance in all directions.

The header is still working great. The color has changed from just about all blue, to blue just near the exhaust flange and the rest dull chrome. Power improvement is great, i cant really say much tho because i dont have a before/after dyno sheet. I have about 1500miles on it, with the 2.5l ka

[Peabody]

Hey deviousKA I put an air intake back in 93 and I do not remember what I took off the car. Anyway, My current header has only 2 ports on it. One is the O2 and the other I thought was the ERG. Look at the picture and tell me what is on the circled part of the header. Maybe I am looking at something that is nothing. THANKSON SH..... I cannot attach. I will start a new thread call what is this on the header...SORRY

[roborot]

how much did that header set you back for?wheres your fan shroud,doesnt your car run hot not using the fan shroud?nice engine bay~!

[deviousKA]

I paid like 195 shipped, bought it off ebay. mookeh.com i think was the seller. My stock fan and fan shroud are removed, i am using electric fans from a subaru 2.5rs. thanks!

[pearlwhite95]

any diffrence in power? yea i always see the obx header on ebay for like 165.00 "buy it now" thats why im interested!

[red240ne]

all of those problems that you mentioned are the same with the Hotshot header. Just put the o2 sensor in the AIV hole, and weld the other 2 holes shut.

curt

[solid]

Hey, how did the welds look on the header, was it nice and smooth? Because i remember seeing some pacesetter ones and they looked really bad. Also is it rusting at all yet?

[Altiman94]

looks good. I am in need of a header cuz my stock downpipe will take a **** on me soon.. Looks like this will be the one.

[zeardux]

yeah i bought and installed an obx header on my kae and drove it for about 2 weeks afterwards, there was a very noticable difference. the welds are very nice, professionally done. i got mine off ebay for 150 with free shipping. i just need to plug my aiv now. i dont like where the o2 sensor is, and i do have a problem with it hitting my steering, but im guessing thats because of the 14yr old motor mounts being shot, other than that i would have to say its woth it. :ylsupe

also there will be very little grip with this header in the rain, so watch out when it rains. unless u like goin sideways like i do

[Arrow]

Hey devious I have had a 240 for about two years now but just started thinking about upgrading it, since I now have it running better... I was just curious if you know if the OBX Header is better than the Hotshot header (or if anyone else knows)... Also, I know this is a little off the thread but since you have the picture of your ennine up there... Is your air intake a K&N FIPK?? I am just curious...

[morpheus78]

Hey devious I have had a 240 for about two years now but just started thinking about upgrading it, since I now have it running better... I was just curious if you know if the OBX Header is better than the Hotshot header (or if anyone else knows)... Also, I know this is a little off the thread but since you have the picture of your ennine up there... Is your air intake a K&N FIPK?? I am just curious...

The OBX is a Hotshot copy. They are almost identical

[Arrow]

Do you know of any differences between that Hotshot and OBX b/c I know that Hotshot goes for about $100 more... Is it just for the name of it then??? I believe that hotshot is ceramic coated... that might be it, or I could be wrong... but if OBX isn't ceramic coated couldn't you do it yourself anyway to help improve the heat dissapation of it??

[deviousKA]

Yes there is a difference, the obx collects 1/4 and 2/3. The similar hotshot collects 1/3 and 2/4. The headers are both 4-2-1 , with similar length design.

Hotshot



Obx



The hotshot is a better header i think, but not $100 better.

[Arrow]

Thanks a lot! Do you know of any problems that people have had w/ the Hotshot header? I am thinking about getting it for one reason... The firing order on the 240 (at least the 90) is 1,3,4,2. and w/ that the Hotshot header would be better at evacuating the exhuast gasses out of the cylinders b/c it would create a strong vaccum that would suck the gas out rather than have it pushed out... And I believe that I have found a Hotshot header for about $265 or so... Maybe a little cheaper. Is it worth it?? I am not sure, if anyone has any reasons that th OBX would do me better I am glad to hear them! or any problems with the Hotshot header... If I am off the thread too much I will post another thread... Don't want to take your thread deviouska...

[deviousKA]

Yes that is the same reason i think the hotshot is marginally better. The effect is much less at higher rpms tho, and i doubt the obx is that much worse at any rpm.

I have seen headers that collect like these two, and even ones that collect 1/2 and 2/3 (4-2-1) on full race ka24's. So i wouldnt suspect a bad header design unless i seen them compared on a dyno.