hillbillycivic

i have a 98 civic with a crack in the manifold right by where the 02 sensor goes in its not affecting anything now but im sure in the future it will. and i have a p0420 so either the cat is already bad or the downstreem o2 is on the fritz.

i looked up the price of replacements and then i looked of the price of headers.

the replacements where like 250+ and the headers where 143 for megan stainless 4-2-1 headers, 158 for stainless megans 4-1 headers and 360 for dc 4-2-1 those where the headers it seams everyone online is puting on there civic so im amusing there good.

i would prefer to get the megans based on price but wanted to know if any headers especially those mentioned are direct bolt on to a stock exhaust.

redm3turbo

if your car has under 150k miles, sometimes you can get honda to replace the exhaust mani for you

hillbillycivic

ya theres a waranty but i think its 8 years 80k or 8 years 100k its not 150 but i could always call and check.

still interested in weather those headers are strait bolt ins for factory exhaust though.

Former User

An exhaust leak also can throw P0420.

Swap'DShuttle

Anything but a Bisimoto header. Have seen multiple headers from him with unfinished welds, not just cracked, flipping unfinished!

92lxsleeper

for it to work and be proper, you need the header, an EX catalytic converter, an EX mid pipe. and the muffler for whatever chassis your car is. coupe/sedan/hatch.

hillbillycivic

what about not proper (ie no florida emissions) will the new header bolt strait to whatever is bolted post cat on the stock system or is the header to short/to long to fit right.

will to reach the part with the resonator on it in the picture and skip the cat and mid pipe.

[IMG][/IMG]

muddmonky

i looked into that a wile back some of the pictures made it look like it fit but are questionable if they where y7 motors but i did see one video on youtube where hes header was about 6in from that pipe but he had a full cat back so hes might have been different.

cvcrcr99

http://www.hondacivicforum.com/forum...version-73237/

delsolintegra

http://www.ebay.com/itm/Performance-...9e9e39&vxp=mtr

I just put these ebay headers on my 93 del sol D16Z6.
I had a cracked exhaust manifold and this was the simplest way to go.
$60 free shipping included the collector pipe to the CAT, gaskets and bolts.
It bolted right in. I used vise grips to compress the spring loaded bolts that connect the exhaust pipe to the collector pipe.
So far I'm happy.

hillbillycivic

awsome thanks for the link ... so i just need the header and a test pipe and should be good to go. 200 bucks total which is an easy 50 bucks cheaper than a replacement.

Chubakon

iTrader: (1)

i had the exact same problem last month when i bought my 98 civic sedan! It came with an aftermarket header, cat and skunk 2 exhaust. i had to replace the cat and exhaust. I used a 99-00 SI cat + exhaust, i kept the aftermarket header (believed it's megan racing as well or off-brand).

cvcrcr99

Items needed:
-EX catalytic converter
-EX header (a.k.a. exhaust manifold)
-O2 sensor extension wire harness
-EX aftermarket or stock catback exhaust

You need a little more than just the header and cat.

hillbillycivic

Items needed:
-EX catalytic converter
-EX header (a.k.a. exhaust manifold)
-O2 sensor extension wire harness -------------still trying to find one at a good price
-EX aftermarket or stock catback exhaust--------will be stock with muffler till i get an apointment at the muffler shop to get some pipe bent

hillbillycivic

just realized both dc and megan use 2in collectors does that mean i gota have my muffershop cut it off and make it 2.5 or 3 if i chose or what?

cvcrcr99

1. eBay for cheap or rywire for quality (I bet they can make one for you if you ask them)

2. Stock exhaust you have now will not fit. Otherwise, it wouldn't be on the parts needed list. The new manifold and cat set-up will be too long. You will be forced to remove the B-pipe from the exhaust and ride around open cat.

No. The header's 2" flange will go into the cat converter no problem. Just get the appropriate sized donut gasket. The shop who is making an exhaust system for you will be able to take car of the rest. Or you can just buy an exhaust kit for a 92-00 (96-00 EX/SI) and do it all yourself. All coupes and sedans have the same exhaust piping from 92-00 except for the vehicles with a stock y7.