HOW DO I

[davidshiel]

go about putting duals on 05 MGM Ultimate with single exhaust? Is there a Kit, what parts do I need; hangers pipes etc?
Thanks, Dave

[Curless]

go about putting duals on 05 MGM Ultimate with single exhaust? Is there a Kit, what parts do I need; hangers pipes etc?
Thanks, Dave


Google is your friend...or any crown vic police package exhaust.

[fastblackmerc]

Any good exhaust shop can do it.

[davidshiel]

Google is your friend...or any crown vic police package exhaust.

I have had trouble locating a package using Google. I was thinking of calling Flowmaster.
I easily Googled sway bar kits, put the rear on, and it is awesome.

[RubberCtyRauder]

Look in the "other parts for sale" section here. There is a NIB obx system fot sale that fits 2 valve marquis

[fireandice9008]

If you need a factory H-pipe, let me know. I've still got the one from the '06 P71 hanging around.

[Spectragod]

Dynomax makes a cat back for the car.

[L.Mark]

If you go to a shop you'll prolly pay north of $250...good luck...don't for get the rumble while you're at it...:D

[davidshiel]

shop. Since I have a single exhaust stock 2005 MGM Ultimate with no duals or headers, the quote came in at 396 to add the other side as a cat back. Seems a bit steep for a little bending, hangers , muffler and pipe.
What do y'all think ?
Dave
PS, I am looking for a nice MM in my area, but will keep the Ultimate, also. Two Mercs are always better than one in my book. This is my 4th MGM. Never met one I didn't like.

[babbage]

shop. Since I have a single exhaust stock 2005 MGM Ultimate with no duals or headers, the quote came in at 396 to add the other side as a cat back. Seems a bit steep for a little bending, hangers , muffler and pipe.
What do y'all think ?
Dave
PS, I am looking for a nice MM in my area, but will keep the Ultimate, also. Two Mercs are always better than one in my book. This is my 4th MGM. Never met one I didn't like.


$396 is probably ok - but I'll bet that's using the inexpensive alumized steel + crush bent. Will rust fast. Factory is stainless.

If you want better you have to pay more. Stainless works makes a setup for your car. $$$ but very nice.

[btvollmuth]

Go to a junkyard and pull the exhaust from any P71 or cab. Got everything after the cats for probably $65 for a friend's gmq. Don't forget to snag the hangers too. Bolt everything in. Then you can go from there in terms of mufflers or exhaust tips.

[davidshiel]

as I have not yet lifted the car to look at how the exhaust routes off the manifolds. I suspect it goes into a Y pipe and then to a single cat. So I can't visualize how a dual system for a cab, or police after cat set up would hook up to it after the cat. Seems like I also need to get pipes that bolt to manifolds. Will try to get under it today. Sorry for the ignorance, but the single exhaust MGM is new to me.

[RubberCtyRauder]

Yes, a pipe will come off the other manifold and then under the car it will connect with either an h pipe or x pipe to balance the system out..There will be no y pipe and you'll need another cat. The h pipe and hangers and over the axle pipe off a junkyard dual exhaust car would be ideal and let the exhaust shop finish fabbing it up.

Example pic
http://i637.photobucket.com/albums/uu92/mdnos/walker0306dual_zps61ee954a.jpg

[2mercs]

All you need is the H pipe back. The H pipe will bolt to your existing cats. I pulled the duals off a cop car last summer for my grand marquis.

[BigCars4Ever]

I have a brand new hanger can sell you cheap.

[Marauderjack]

Do not forget the dampers if you can get them from a junk yard!!:beer:

If you don't use them the system will rattle like crazy at and just above idle!!:eek:

[davidshiel]

Yes, a pipe will come off the other manifold and then under the car it will connect with either an h pipe or x pipe to balance the system out..There will be no y pipe and you'll need another cat. The h pipe and hangers and over the axle pipe off a junkyard dual exhaust car would be ideal and let the exhaust shop finish fabbing it up.

Example pic
http://i637.photobucket.com/albums/uu92/mdnos/walker0306dual_zps61ee954a.jpg

here in Charleston with all I will need including hangars. Will go get the stuff tomorrow.
Thanks to all for educating me.

Just put the Addco sway bar on front to match the Addco rear I put on a couple of weeks ago. Easy job- about an hour on jack stands and with hand tools.