Exhaust fitment issues on b18 swapped ej coupe
06-05-2017, 07:07 AM
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Exhaust fitment issues on b18 swapped ej coupe
Ok guys, so my wife had an eg hatch with a b18b1 a couple years ago, and got hit not too long ago, so we took the whole swap and put into my 94 civic coupe. Since then, I've had issues finding an exhaust to actually fit. Everything seems to be about 3 to 4 inches too short. I've tried a new stock catback exhaust, and we had to cut, and extend it to make it fit, so I got an aftermarket catback exhaust, and the same thing is happening. Got the resonator pipe bolted up to the test pipe, but the S pipe is still 3 to 4 inches from sitting in the exhaust tunnel properly.
I'm really trying not to have to cut and weld another new exhaust.
My question is, how can I tell if the header and test pipe is the correct length seeing as its a swap?
I'm almost to the point where I'm about to just cut and extend the test pipe instead of the resonator piping.
I'm really trying not to have to cut and weld another new exhaust.
My question is, how can I tell if the header and test pipe is the correct length seeing as its a swap?
I'm almost to the point where I'm about to just cut and extend the test pipe instead of the resonator piping.
06-06-2017, 03:36 AM
#3
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped eg couoe
So don't try to help at all. Just tell me to take it somewhere, and let someone else figure it out. Great advice. I'll definitely look into that.
06-06-2017, 07:30 AM
#5
O.G. triple O.G.
Re: Exhaust fitment issues on b18 swapped eg couoe
How else are you going to learn? Did you think we had someone hold our precious hand and show us every single thing when it comes to working on cars? Get real..
06-06-2017, 11:45 AM
#6
Re: Exhaust fitment issues on b18 swapped eg couoe
The OEM route...
If it's a US-spec B18B1 from the 94+ Integra, the B-pipe and catalytic converter from an Integra that came with that motor (I'm guessing LS & RS) will work perfectly. Then just use your choice of Axle-back muffler from an EG or EK.
If it's a US-spec B18B1 from the 94+ Integra, the B-pipe and catalytic converter from an Integra that came with that motor (I'm guessing LS & RS) will work perfectly. Then just use your choice of Axle-back muffler from an EG or EK.
06-06-2017, 11:49 AM
#7
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped eg couoe
I was being a smart ***. Obviously, I want to fix it myself, or else I wouldn't have come here for advice. I don't like taking my **** to someone else. I like knowing that that it's done right, and done by me.
Trending Topics
06-06-2017, 11:54 AM
#8
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped eg couoe
I have a 4-2-1 header with what looks to be the b1 A pipe, and a test pipe. I've tried putting an oem catback on (guy I bought it from said it was for an eg coupe, but the part number said it was for a 94 ls integra) and it was still 3 inches short. So I ordered another aftermarket catback exhaust hoping that it would actually fit because double, triple checked to make sure that it was for a 94 civic coupe, and it's still 3 inches or so short of the tunnel for the S pipe.
06-06-2017, 11:55 AM
#9
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
06-06-2017, 04:39 PM
#11
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
06-07-2017, 06:16 AM
#14
Re: Exhaust fitment issues on b18 swapped ej coupe
Sure, sure. But cutting & pasting your results below your snarky comment (a less-than minimal effort) would definitely make the internet a better place. Especially when future people....who ARE searching first...end up in this thread (and they will) simply because it's newer.
Sorry, I've just been annoyed with the internet lately. I can no longer find anything except commercials and threads telling people to search. It sucks.
Sorry, I've just been annoyed with the internet lately. I can no longer find anything except commercials and threads telling people to search. It sucks.
06-07-2017, 08:26 AM
#15
O.G. triple O.G.
Re: Exhaust fitment issues on b18 swapped ej coupe
These cars are well over 20yrs old. It's not like it's 1995 or something where no one cares to share info on how to work on these cars. However, working on these cars isn't ROCKET SCIENCE. If it's that difficult, then maybe you should either pay someone to do the work or figure it out yourself. They do make Haynes/Chilton work manuals, sold online...AutoZone, Advance Auto Parts, flea market, etc.
06-07-2017, 06:27 PM
#16
Honda-Tech Member
Join Date: Feb 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped ej coupe
I had the same issue with my Del Sol. I was just talking with one of the guys over at DC Sports about it and I'll paste his comment below. I ended up purchasing a DC Sports LS Header and CAT + Del Sol Cat-Back Exhaust system. If I remember I'll post back when they arrive on how they fit.
We have seen this happen before. There is a distinct difference between the various B series chassis’. Why did Honda do this we do not know. When we design and develop that parts we have to follow whatever the OEM lengths are so with that said. GS-R is the shortest of them all and do not have a O2 sensor on the header, they are located on the catalytic converter. With a shorter header the catalytic converter is more forward and the exhaust is longer. This is the opposite for the LS/RS/GS ( non -VTEC motors) the header is longer so the catalytic converter is further back with a shorter exhaust.Sometimes when people buy used cars or do motor swaps the parts are mismatched fit causing an issue for the next owner or service person.You either have a VTEC motor swap or are running non VTEC exhaust components on a VTEC chassisIf you are in the state of CA (or any state that follows CA emissions) and want to stay street legal( CARB approved) you have to use whoever header is correct for your motor and modify the exhaust as needed. If you are not concerned with that then you can use a LS version header.Hope this helps. If you have any other questions feel free to contact us.
06-07-2017, 06:36 PM
#17
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped ej coupe
These cars are well over 20yrs old. It's not like it's 1995 or something where no one cares to share info on how to work on these cars. However, working on these cars isn't ROCKET SCIENCE. If it's that difficult, then maybe you should either pay someone to do the work or figure it out yourself. They do make Haynes/Chilton work manuals, sold online...AutoZone, Advance Auto Parts, flea market, etc.
I was trying not to take the easy way out, and take it to a shop, or cut, and piece **** together. I like my cars to be done right. Not zip tied, and half assed.
06-07-2017, 06:36 PM
#18
Honda-Tech Member
Thread Starter
Join Date: Feb 2016
Location: Nashville, tn
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped ej coupe
I had the same issue with my Del Sol. I was just talking with one of the guys over at DC Sports about it and I'll paste his comment below. I ended up purchasing a DC Sports LS Header and CAT + Del Sol Cat-Back Exhaust system. If I remember I'll post back when they arrive on how they fit.
08-15-2017, 11:30 AM
#19
Honda-Tech Member
Join Date: Feb 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust fitment issues on b18 swapped ej coupe
Update to my previous post.
I finally got around to putting the exhaust in. Everything fit perfectly except for the cat-back. I had to have the elbow between the resonator section and the axle-back section shortened by about two inches so it would fit. However, the advice from DC Sports about fitting the header and the Cat together was spot on.
Hope this helps!
Jed
I finally got around to putting the exhaust in. Everything fit perfectly except for the cat-back. I had to have the elbow between the resonator section and the axle-back section shortened by about two inches so it would fit. However, the advice from DC Sports about fitting the header and the Cat together was spot on.
Hope this helps!
Jed
08-15-2017, 08:49 PM
#20
Honda-Tech Member
Re: Exhaust fitment issues on b18 swapped ej coupe
It is unlikely that all of the manufacturers who create cat-back exhausts for '92-95 Civic Coupes are building them wrong exactly the same way... so your issue is likely a combination of the header and cat (or test pipe) combination. The response from DC Sports illustrates a common problem with using a pre-2000 GSR style header... there is no O2 sensor bung welded in them and the OE cat for that application is longer than a civic cat by about 4 inches. So, your solution is either to spend time and money trying to find a header and cat or test pipe that are the proper length for your car and new cat-back OR cut, lengthen and re-weld your test pipe to meet the inlet plate of your cat-back and be done with it. Either way, your cat-back will not need to be modified, and likely, if you change to a different one later, it will fit perfectly too.
08-17-2017, 08:27 AM
#23
Honda-Tech Member
Re: Exhaust fitment issues on b18 swapped ej coupe
Hey now, this guy is demanding a bolt-on, OEM fit and quality, off-the-shelf exhaust! Those extra 3 bolts are wayyy too much effort
Seriously tho, if you want everything to bolt up with OEM parts, maybe you shouldn't have an engine swap.
08-21-2017, 01:22 PM
#25
Honda-Tech Member
Re: Exhaust fitment issues on b18 swapped ej coupe
You should be able to do this with no issue, something is off
I was able to put a b16a into a 94 ex with stock exhaust and cat, using a dc sports header for a DOHC del sol
same motor and header into a 93si with stock cat and exhaust, no issues
I believe the LS and b16a headers are the same or similar, do you have a picture of your header from underneath? can you measure your cat ?
I was able to put a b16a into a 94 ex with stock exhaust and cat, using a dc sports header for a DOHC del sol
same motor and header into a 93si with stock cat and exhaust, no issues
I believe the LS and b16a headers are the same or similar, do you have a picture of your header from underneath? can you measure your cat ?
Thread
Thread Starter
Forum
Replies
Last Post