3" Megan Downpipe w/ OEM o2 housing

[95CarbonEclipse]

Does the Megan 3" Downpipe bolt up to the stock o2 housing? I've got an exhaust leak in the flex section of my stock DP and have read tons of great reviews on the Megan Exhaust systems.

BTW, i'm already aware of the *fixed* DP, and to make sure i get it from a credible source.

 

[MidnightTSI]

Sorry, I can't tell you that it can fit but I can tell you that I just received the downpipe an it is a beaty. The welds are great and it is smooth as silk in the inside.

 

[scottsee]

I don't know about the new ones. I had to remove the 02 studs, drill the holes larger and use longer bolts to get it to fit correctly.

 

[Raph]

Does the Megan 3" Downpipe bolt up to the stock o2 housing? I've got an exhaust leak in the flex section of my stock DP and have read tons of great reviews on the Megan Exhaust systems.

BTW, i'm already aware of the *fixed* DP, and to make sure i get it from a credible source.

Yes,it does.. i have the megan DP,and i ported my 02 housing to about 2,5 inches,the DP looks like it has a 2,5inch flange because it bolted up fine,and the flex section clears the oilpan . i also welded in a second bung for my WBO2 and noone at work believed me when i told them what the DP costs.. im pleased,its still shiney like from day 1.

 

[cooldude919]

I was also thinking of getting one. Upgrading to a 14b here in the next few weeks, you guys think i would get decent gains from a new downpipe? Also im guessing slowboy/dsmparts all now have the "fixed" one that bolts up to the stock exhaust?

 

[7"exhaust_tip]

you might have problems trying to get a socket on the nuts since the 3" pipe is so big

but you can make it work. i did.

 

[calreef18]

Bolts up fine and is a nice upgrade to do with the 14b.

 

[95CarbonEclipse]

Sweet! So, if i'm hearing you guys right... the Megan 3" DP has a 2.5" flange in order to bolt up to the stock o2 housing? If so, GREAT!

 

[95CarbonEclipse]

I'm thinking that i'll go with the Punishment Racing $129 Atmosphere Vented O2 Housing 2.5" Exhaust elbow and then the 3" Megan DP/Catless Exhaust. What do you guys think of that??

 

[delta448]

I got my MR downpipe from a certain well-known shop about 2 months ago. I was assured that I would get the revised version by an employee. I didn't.
Feel free to PM me if you want to know which shop it was.

The older version does not fit the O2 housing studs without modding, and the rear flange on it is rotated about 45 degrees from lining up with the catback's flange. It's been a major PITA and is still not on the car.

Consider yourself warned.

 

[calreef18]

PM me if you want to know where I got mine for a good price, and the new version. The o2 atmosphere should be sweet, probably loud though. It would be good depending on what your car is going to be used for.

 

[95CarbonEclipse]

I was also thinking of getting one. Upgrading to a 14b here in the next few weeks, you guys think i would get decent gains from a new downpipe? Also im guessing slowboy/dsmparts all now have the "fixed" one that bolts up to the stock exhaust?

I got my MR downpipe from a certain well-known shop about 2 months ago. I was assured that I would get the revised version by an employee. I didn't.
Feel free to PM me if you want to know which shop it was.

The older version does not fit the O2 housing studs without modding, and the rear flange on it is rotated about 45 degrees from lining up with the catback's flange. It's been a major PITA and is still not on the car.

Consider yourself warned.

Underground Motorsports http://www.undergroundmotorsports.com/downpipes/mitsubishi.html, they're a licensed MR Dealer and carry the new revised edition of the MR DP for $110.

Calreef... what'd you pay for yours and where'd you get it from??

 

[cooldude919]

Thanks for the info, sent them an email to get an idea on shipping.

 

[calreef18]

95carboneclipse, that's the place I got it from, good price, pretty cheap on shipping even to the west coast, it ended up being under 150 if I remember right.

 

[cooldude919]

Looks like it should be a pretty decent deal for me then, im in Missouri, so not far away. May also grab the megan strut tower bar while im ordering. They also have a cheap FPR but guessing its junky?

 

[delta448]

Underground Motorsports http://www.undergroundmotorsports.com/downpipes/mitsubishi.html, they're a licensed MR Dealer and carry the new revised edition of the MR DP for $110.

Calreef... what'd you pay for yours and where'd you get it from??

95carboneclipse, that's the place I got it from, good price, pretty cheap on shipping even to the west coast, it ended up being under 150 if I remember right.

Now I really feel hosed. I paid 150 plus shipping.

 

[95CarbonEclipse]

Now I really feel hosed. I paid 150 plus shipping.

Sorry Delta. My posts may be low, but i've been listening to what you guys have been saying for a while now...

 

[kenamond]

I've been overting my eyes whenever I see anything I want that costs some money, but this looks tempting.

That UM DP site shows a 2.5" inlet for the GST DP but a 3" inlet for the GSX DP. I know there are differences between FWD and AWD exhausts, but I don't know if the DP is different. I have stock (ported) O2 and can port the outlet to 2.5, but I doubt there's enough material to port to 3".

Will the 2.5" inlet GST model work on an AWD (or does anyone know if you can port a 2g O2 to 3" safely and if it has the same flange bolt pattern as the 3" inlet DP)? I wasn't planning on a new O2 housing.

Also, does it bolt up to the stock exhaust? I'm on a budget, so doing the whole exhaust at this point isn't an option (without wife-consequences), but this 100% stock exhaust is KILLING my spool and top end boost.

Any other issues in the future with this DP when I get funds for the catback?

Good info in this thread. Thanks guys!

 

[delta448]

A thread with some good info.

Seems the only problems were with the 2G AWD downpipes. GST and 1G cars have no worries. Also, it seems that many vendors have not yet recieved any updated pipes, and/or were never told by MR that the 2G AWD pipe has been redesigned.

 

[Karma]

That UM DP site shows a 2.5" inlet for the GST DP but a 3" inlet for the GSX DP. I know there are differences between FWD and AWD exhausts, but I don't know if the DP is different. I have stock (ported) O2 and can port the outlet to 2.5, but I doubt there's enough material to port to 3".

Will the 2.5" inlet GST model work on an AWD (or does anyone know if you can port a 2g O2 to 3" safely and if it has the same flange bolt pattern as the 3" inlet DP)? I wasn't planning on a new O2 housing.

Also, does it bolt up to the stock exhaust? I'm on a budget, so doing the whole exhaust at this point isn't an option (without wife-consequences), but this 100% stock exhaust is KILLING my spool and top end boost.

I have a GSx and the DP is 2.5'' for about an inch, then it opens op to 3'' Its like that so it can bolt to the stock o2 houseing. As for the bolting up, I had mine welded to my resinator, but it had flanges on the end to bolt to the cat.
If your worried about your wife knowing, the DP didnt make my car louder untill 5000K+

Sean

 

[95CarbonEclipse]

Check this thread to find out a ton of info on the new "fixed" 3" DP from MR.

http://www.dsmtuners.com/forums/showthread.php?t=193367&highlight=Megan+downpipe

 

[95CarbonEclipse]

If your worried about your wife knowing, the DP didnt make my car louder untill 5000K+

Sean

I'm pretty sure she wouldn't notice the sound factor even if he took the exhaust completely off... it's the bank account factor that she'd trip on.

...stop me when I lie.

 

[kenamond]

I'm pretty sure she wouldn't notice the sound factor even if he took the exhaust completely off... it's the bank account factor that she'd trip on.

...stop me when I lie.

Well, it's the $600 for a 3" turboback with cat. $150 for the DP now and the rest in pieces later (if possible) is how I can do it (eat $1 burritos for lunch for a couple of weeks, and I can save up $100 )

I still don't understand how a 3" DP can bolt up to a 2.25" cat flange. Is the reduction in the adapter piece?

So the revised 2g AWD DP goes from 2.5" to 3" and bolts straight up to the stock O2? That's what I need...as long as it bolts to the stock cat, too, I'm "golden".

 

[delta448]

Check this thread to find out a ton of info on the new "fixed" 3" DP from MR.

http://www.dsmtuners.com/forums/showthread.php?t=193367&highlight=Megan+downpipe

I already linked that same thread 2 posts prior.

Recieved via PM:

So I did just purchase a MR DP from Slowboy and I think it is the previous version. I tried hooking it up to my car and its 3" too short and I couldnt get the bolts on the O2 housing. Also the flange is off by quite a few degrees. You said in a recent thread that it is going to require some modding. What exactly do I need to do? Kind of made me mad.

http://www.dsmtuners.com/forums/showthread.php?t=191044

The missing 3" length is probably because you removed the adaptor pipe that goes between the cat to the catback.

For the O2 flange:
You could grind the pipe near the O2 flange so you can fit the nuts on the existing studs or you can cut off the studs and drill 2 holes further out on the housing to match the dp and use the supplied bolts.

For the rear flange:
The easiest would be to cut the pipe near the rear flange, line everything up correctly and tack weld it. Then remove the pipe and lay down a nice thick weld all the way around the pipe. Or you could just cut the pipe and use a pair of slip-fit exhaust clamps tightened down over a rolled up piece of sheet metal over the cut.

 

[95CarbonEclipse]

I already linked that same thread 2 posts prior.

It's a completely different thread then the one you posted earlier. The thread I linked is entirely on the changes that MR made to the old DP that didn't fit right. It also shows the entire exhaust, from DP to Tip.