I have been getting conflicting info and I am trying to find out a solid answer

Will an aftermarket 4-2-1 header for a 94+ ls/gs/rs (b18b1) fit on a 1990 GS (b18a) with no mods other than 02 sensor relocation?

I have been getting one of two answers

1) Yes it fits perfectly

2) No you need additional piping to make it fit


Details would be great...

I'm not trying to be difficult I am just finding that there are not very many used 90-91 Integra headers, so right now buying brand new is the only option

 

up

 

fit just fine.

 

thanks, have you tried it?

hmmmm : I wish someone who has done this would reply

 

I am sure that any b-series header will bolt onto your existing b18a head.

I am 99% sure that once you do this, due to different catalytic converter lengths and different exhaust piping length, you will need to make some manner of modification to the exhaust piping (extend or shorten).

The best way I can think of to figure this out is to find a 94+ LS/RS/GS/SE, measure the cat length and the exhaust piping length, and the distance from the front of the cat to the front of the head (where your header bolts to), and see if you can interchange parts to make it fit, or figure out what mods would be needed. For example, if the muffler piping is the same distance away from your head, but the b18b header and cat are different lengths than the b18a header/cat, put both the b18b header and b18b cat onto your car and bolt it to the existing piping.

 

a b series all bolt up the same. doesnt matter the year. the only differences really is the length of runners. the gsr header is longer and the b16/itr head is shorter

 

Sorry maybe my question wasn't clear, I know that it will bolt up to the head perfectly....however I was wondering will it bolt to the cat perfectly too or will I need to get addtional piping?

From purplegsr answer, my guess is no and that I willl prop need to get a piece between the cat and header

 

if its an LS header, its an LS header. the body style of the gens changed but not the motors.

 

Dude, no kidding. They all bolt to the engine the same but the the runners are different lengths for different years. 90-91, 92-93, and 94+ all have different exhaust manifolds. Not exactly how different lengths they are, but that's what this guy is asking.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda Hick &raquo;</TD></TR><TR><TD CLASS="quote">Dude, no kidding. They all bolt to the engine the same but the the runners are different lengths for different years. 90-91, 92-93, and 94+ all have different exhaust manifolds. Not exactly how different lengths they are, but that's what this guy is asking.</TD></TR></TABLE>


ahhh thank you that was just the answer I was looking for

 

Will it bolt up to the exhaust the same though?