EVO III o2 housing + MEGAN RACING 3" Downpipe

[dragonsl8r]

mod 2 and 2.5 and the nightmare that ensued.

well after brakes and rims i decided to go with the exhaust as my next area of modification ( be advised cash flow did play a small role in my choices ).
after looking around and checking out the forum ( yes i did actually search the forum for info.). i settle on the MEGAN RACING 3" 02 housing back full exhaust system. the people at MR were helpful, efficient, and fast (my parts arrived from Cali in only 2 days). with everything going so well up to this point i was waiting for the other shoe to drop and it did. after getting all the parts laid out and drooling on them for awhile i got the car in the air and pulled the old system, it took less than 15min.
wait for it.....here it comes, the other shoe...WTF the downpipe does not lineup . i take a break and come back and no the wishful thinking had not changed the pipe so that it would fit. at that point i remembered some of the DSM guys stated that they used hammers and grinders to make theirs fit. i also remembered a thread stating this problem had been fixed by MR. off to the phone i go, the MR rep asked me to check the part# on the box


he verifies that i do in fact have the "fixed" version of the downpipe. i thought i'm not going to get anywhere with this approach. then i thought to myself EVO III o2 housing thats what i need !!!
back to the phone i go this time i call Joe at SlowBoy and he gives me a great deal on a ceramic coated hafe exhaust manifold and the EVO III o2h. parts from SBR arrive in 2 days.

at this point the nightmare intensifies, after removing the driver side fan and the heat shielding things are going great until a try to get the wrench on the bottom o2 housing nut hrs later i finally get it off.

(note: guys if you don't have a set of "S" wrenches get a set and this becomes a whole lot easieri didn't think of that until i finished the install.)

after the evo housing is in i grab the downpipe bolt pattern fitment flange angle

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after i calm down i see that the flex pipe is hitting the transfer case and thats why the flange wont sit flush.

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so what to do now... a tig welder.
i drive my other car to a local shop and get a quote and setup an appointment.
back at the house i chop the old exhaust back to the cat, grind the holes so it will fit the evo o2h, grab some clothes hangers to hold the cat in place, and i'm at the shop before my guy finishes unlocking and setting up for the days work. to save on the shop cost i opted to only have him cut,fit,weld and install the downpipe thinking "i'll get the rest done in no time". an hour and a half later he's done "ok you're good to go. be careful on the way home it'll be a little loud."
man was that an understatement i thought my teeth would rattle out and i seemed to have problems concentrating on the road my head was vibrating so much.

all in all though the rest of the install went well. runs great sounds great and i'm glad to have done it.

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[gofer]

your DSM mod'ing experience sounds similar to mine. buckle up for the ride big guy because theres A LOT more things like that to come.

 

[DSM nOOb]

holy headache.

 

[LiquidX]

So you didn't research the Evo3 O2 housing did you? Sits a a different angle than the stock setup which is the main reason why it doesn't fit properly.

 

[chinola69]

Man was thinking about getting the Megan DP but not to sure anymore

 

[natertater]

probably be fine as long as its not on an evo 3 outlet...

 

[dragonsl8r]

So you didn't research the Evo3 O2 housing did you? Sits a a different angle than the stock setup which is the main reason why it doesn't fit properly.

yeah i researched the evo o2 housing and i knew it hand a larger bolt pattern and a different angle.thats why the original plan was to bolt the MR downpipe to the stock o2 housing and do the evo housing mod later but,when the downpipe wouldn't clear the transfer case without "help"and i didn't like the idea of wallowing out the holes to get it to fit easier.or creating a stress point at the flex section by forcing it.

even though it was a huge hassle i am still very happy to have the MR system and when you add the trip to the welding shop i still came out with a lower overall cost than many other setups.

please take note that MR did offer to take the pipe back but, i chose to keep it.
as a matter of fact when i get the next gsx i'll be calling MR again for the exhaust upgrades.

if you were thinking of the MR system get it just plan better than i did.

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[whyadsm]

sorry to high jack the thread, but does a megan o2 housing bolts up to evo3 16g turbo? I have t25 for now and looking to upgrade my dp to 3in and 3inch exhaust. Just in case I get boost creep, Im going to replace my old o2 housing to megan and dont want to upgrade twice.

 

[Bluefire16]

I started to read your post...then quickly got bored.

Scrolled and saw how long/obnoxious it was and decided i cannot even try to read it.

I hate emoticons.

A simple search would tell you a e3 o2 housing will not work

 

[AlaskanDsm]

I started to read your post...then quickly got bored.

Scrolled and saw how long/obnoxious it was and decided i cannot even try to read it.

I hate emoticons.

A simple search would tell you a e3 o2 housing will not work

Doesn't apply...

This thread is a year old, whyadsm is bringing it back becasue he had questions about purchasing new exhaust components.

Upgrading will deffinetely help in the long run as far as total flow. But if you have too much of a free flowing exhaust, you may end up with boost creep. I don't know too much about boost creep but I do know that porting the hotside of the turbo and getting a larger flapper for the wastegate help to decrease the chances of boost creep. Others though have much more information that they might be able to provide.

 

[Bluefire16]

^^ Oh geeze i saw 2/15 and thought of today somehow.....even though its the 14th... my bad. I was talking about the OP.

Good eye.

But anyways, just port the 2g one... it will do the job.

 

[dsmtwins2g]

Would this fix the problem?i have megan racing downpipe and its 2.5" then 3" my evo 3 o2 housing wont fit.
304SS DSM EVO3 O2 housing/ Downpipe flange | eBay

 

[vince6756]

If you want to end up mandrel bending the Megan down pipe to take that angle the evo3 takes, buy the Megan. Or for a few dollars more and a nice fit, RRE is the way to go.