I'm about to drop a B18C1 into my 90 CRX Si.
Does anyone know what header/ exhaust manifold would clear the oil pan and crossmember AND "bolt" up to the stock Catalytic Converter? I don't want to take it to a shop and have them weld a piece to fit it, I want it "BOLT ON."

Thanks in advance.

 

Nothing will just bolt up.

 

x2 nothing is gonna just work and fit like stock. its an engine swap, your exhaust wasnt designed for that b series exhaust header. get creative and just have a pipe weled on. done

 

i think stock header and downpipe will work, but not the cat

 

get to know someone with a welder, it tends to be way cheaper than taking it in and getting it done professionally.

 

you are correct. i used a diff converter and welded the exhaust to fit

 

My setup right now for my ls is as follow:

Top Half Exhaust Manifold from a 90-91 Integra or any b-series that are 4-1.
Downpipe is my stock crx/civic downpipe with the uberly loved extension. And I really do love that extension. lol.

It should BOLT-ON.
The only modification you will have to do is keep twisting the cat around until all the holes/studs line up.

GL and post some pix!!! I would post my setup, but it is 6 am and I just got off work while still being cracked out on two tall cans of rockstar.

 

It should BOLT-ON.
The only modification you will have to do is keep twisting the cat around until all the holes/studs line up.


thats what i did until i was able to get an adjustable test pipe. once you have the stock cat mounted to where its gonna line up with both the exhaust manifold and the cat back then it may require some muscle to try and get all the bolts in. but, it works and should hold you off for a while.

 

lol i used a (da) ls down pipe on my single cam header and it bolted right up? hmmmm lol

 

So it looks like some combinations of downpipe and cats will bolt up!

BTW, thanks to the guys that said to have it welded I do have a mig welder and I will use it if I need to.

 

I got stock b series headers, cut and rewelded the position on the cat