Is S13 KA & and S14 Ka same thing

[RHDS13]

IM looking at buying a 4-1 header for an s13 dohc and 3inch downpipe and full 3inch exhaust If i get the one for s14 ka will it bolt the same ?

[v-empire]

no. but it lines up and you can use it. but one i will be for the s13 and the other for the s14. gaskets you can get from autozone for 8 bucks. and yes, they look like they fit, but the ka24de codes are almost not the same but actually they are.

good luck.

[RHDS13]

no. but it lines up and you can use it. but one iwll be for ther s

What So your saying that if i buy an s14 header that its the same bolt patternas the s13 ?

[JJ Alfano]

to my knowledge, the only difference in the 2 KAs, is cams and valve cover bolts, along with some egr stuff in the back,

[Neejay]

What So your saying that if i buy an s14 header that its the same bolt patternas the s13 ?
Yes. You would need to get a s14 shorty header then you could use the sr 3" downpipe, but I've heard (from someone who knows their shit) the flange angle would need to be adjusted/rewelded in order for it to bolt up to the stock s13 exhaust. (I guess you could re-do the cat flange or whatever)

I also heard the only downside to this is that it doesn't add any more hp, because it's basically the same setup as stock s14.

s14 shorty header -> 3" downpipe -> cat -> exhaust

[RHDS13]

I also heard the only downside to this is that it doesn't add any more hp,

s14 shorty header -> 3" downpipe -> cat -> exhaust

Well why wouldnt more flow give you more HP? I am going to port and polish the head do a 3way valve job metal head gasket and maybe cams for just the daily driver

Then my other car is going to have RB25DET with GT35R Makeing roughly 500hp+

[Neejay]

I have no idea, lol. Thats why I said I "heard" that particular part. But there was an agreement of a sort between a few people when that was posted somewhere else.

I mean, hell, I have a header with stock exhaust :D

[carlova78]

why do u have a dohc. did ui get a s13 yet

[tc240]

timing chain cover is also different on s14 ka's... they don't mix and match!

dunno about the header though.

[youngster603]

i've always heard that all the intake/exhaust mods on a NA KA don't add up to a whole lot in terms of power, no experience with it though.

[RHDS13]

Oh well I will get dyno proof stock then with all mods and let everyone know

[Neejay]

Oh well I will get dyno proof stock then with all mods and let everyone know
Yeah, I say go for it. Some people told me it was pointless to get a header with stock exhaust, but I can definitely tell its breathing better, especially on the top end. My girlfriend even noticed just from riding (without me mentioning it).