szuberi

I did some research and talked to a few shops and learned that the WS2 full catback system available for EK coupes will not fit the sedans. Otherwise, most catbacks made for coupes usually fit the sedans as well but not in this case.

Does anyone have some idea as to why?

I am guessing...that it is because of the difference in the exhaust manifold on the Y8 and Y7 motors. The Y7 manifold has the cat built-in into it whiel the Y8's is under the car.

So in order to install the WS2 on my sedan...i am thinking i might have to get either an SI or an aftermarket d-series header altogether?

Any thoughts on this? can this be the reason or there is something else.

Thanks in advance

imported_kIeRaN

i know that for 92-95, sedan and coupe exhausts are the exact same

szuberi

yeah...but for 96-00, they are not.....so anybody else?

BOND007

I would have to say that your assumption is most liekly correct on that one. truthfully to run the full ehaust on a d16y7 you need after market or si header.....after market catalytic and you need to extend the secondary o2 sensor

Nova_Dust

Salman, if all you need is to shorten the pipe, then it would be easy, but in this case, you need to add length for your DX sedan.

I would almost get a Y8 exhaust manifold and match things up that way. Or get an aftermarket header for cheap.

civicnation

get a motor swap salman

Double_B

Not only would you have to get a Y8 Manifold, but you will either have to get a Y8 Cat or an aftermarket one, and also would have to extend your 02 sensor to make it all work.

szuberi

most probably getting a new car next year raj swaps are beyond my aptitude.

thanks charles and neil for the advice....i most certainly require an SI or an aftermarket header for the WS2 i believe.

Double_B

Also a cat buddy, check my post above yours

Nova_Dust

Salman, if a new car is in the agenda, then just get a muffler and call it a day, don't spend more than you need to.

BOND007

A HMMMMM I BELIEV I ALREADY STATED THAT

szuberi

yes yes neil..i didnt miss it but forgot to mention it in my last post. i am just reading some archived posts in the performance section at the moment and mostly people are using magnaflow high perf. cats on their civics...so i might get that one.

in contrast...i am giving a second thought to getting a ws2 muffler only, a high flow cat and going with custom 2.5" piping...after swapping the manifold.

szuberi

makes sense...but what do i do about my feeling of 'being left out' when i see all of you hardcore auto guys doing some crazy modding to their civics....

chris_si98

2.5" piping and hi-flow cat?

why? You don't like low-end?

szuberi

the low end will take a hit anyway with the I/H/E dont you think? how much...i am not sure.

chris_si98

so why bothe?r the decrease in fuel mileage and drivability takes a nice ****

Do yourself a favour, ditch the hi-flow cat and 2.5" piping. And get a smaller res. and muffler if you want a sound.

Nova_Dust

For 1.6liter, I would go no more than 2.38" piping. Even 2.25" mandrel band is very nice, compare to stock 2.25" crush band.

Double_B

Hmmmmmmmmmmm how did I miss that!

Damn!

imported_SilverSleeper

Stock is not 2.25 inch. Not even close. On a Y7 at the downpipe from the cat, the pipe measures 1 inch in overall out diameter.

I/H/E is very crucial to a Y7. Turbo magazine did a test where they swapped in a Y8 intake and exhaust manifold and put an Apexi N1 (2.5 inch diameter i believe) and it gained 15 hp at the wheels. All these mods did wonders to fix the Y7's funky power band.

I'm not sure of Chris' claims of drastically reduced low end. I would like to see some empirical evidence to back this up vis a vis 2.5 inch cat back.

szuberi

here is a clip of the ws2 on a 99-00 sedan...