Replacement muffler for '91

[Labrat]

I had to replace the muffler today and the shop used the following muffler; Consolidated Muffler Maremount, Model CM107,distributed by IMPCO 151219. It is a direct replacement with no modifications needed and looks original under the car. The back rubber attachment will have to be welded to the muffler for stability but that is no problem as it is in the correct place. Also the dual outlets permit 2 1/4" bent tail pipes to fit under the valence cutout perfectly. I added rolled chrome tips and it looks very nice. The specs are inlet 2 1/2 and dual 2 1/4 outlets. Overal length as delivered includeing muffler outlets is 27 1/2" and muffler body is 21" Centerlinel are 4 1/2 X 9 3/4" . The muffler is stock quiet and has a aluminized finish. You can visit IMCO - International Muffler Company - Exhaust - Catalytic Converters - Mufflers for more information.

[Barney Eaton]

Thanks for posting that information

[Ronnie]

Good info. Those mufflers are made in a plant about 30 miles from my house. I know a couple of people who work there. It's good to know that some things are still made in the USA.

[Labrat]

[DH Comet]

This is very timely information; my '88 is still wearing its original muffler, and it's overdue for a new one - do all four years use the same muffler?

[wws944]

This is very timely information; my '88 is still wearing its original muffler, and it's overdue for a new one - do all four years use the same muffler?

No, '91 has 2 1/2" inlet, whereas the '88-'90 has a 2 1/4" inlet. For '88-'90, consider the Walker 18240 or IMCO CM85. Both have dual outlets like the original Reatta mufflers.

[Guest Corvanti]

the '88-'90 Walker 18240 muffler is available thru "The Reatta Store": Walker Exhaust 18240 Sound FX Muffler for the Buick Reatta - The Reatta Store

[Barney Eaton]

Look at the IMCO/Maremont catalog for performance/Turbo mufflers (which will be a little louder) T-923 is listed as a Ford truck muffler but has all three ports 2 1/4 inches in diameter and body length is 16" which would work on the '88-'90 cars.

Both T-922 & T-908 have 2 1/2 inch ports in all locations and the body is 19" long.

If you are not going for as close to stock as possible. I would not worry about the various port sizes as long as you do not go smaller. Example... If you use the T-923 you need to add 6" to the length somewhere because the stock muffler body is 22 1/2 and the 923 is only 16. When you make the adaptor pipe, (to get the 6") you can adjust the ends to fit the muffler and existing pipe.

Edited April 1, 2013 by Barney Eaton (see edit history)

[DH Comet]

I'd be looking for the quietest muffler possible; to me, that would be the original Buick experience!

[Machiner 55]

Comet,

I agree. I put a smaller (lengthwise) muffler on my '89 and the geometry of the pipes worked out great, but the sound is more"rumblier" than I'd like.

After cruising down the highway there's a very noticeable difference when I kick off the cruise control and coast down the exit ramp. It's almost as if the engine shut down it gets so quiet. Would rather it be that way all the time.

John F.

[Labrat]

I'd be looking for the quietest muffler possible; to me, that would be the original Buick experience!

The muffler I recently installed is very quiet and most likely as quiet as an original muffler since it is the same size and make-up. I wanted it quiet also. If I need noise I drag out the old Vette and row through the gears until I'm satisfied or get in the racing simulator and fire up the 650 watt surround system it is hooked to.

[Machiner 55]

Labrat,

Whoa, cool. Recaro racing seat and everything!

John F.

[DH Comet]

Just for people's information: I just ordered the Walker 18240 Sound FX muffler from the Reatta store, and got a cancellation notice saying that the part was out of stock and would not be back. Disappointing!

[Ronnie]

Thanks for letting us know. Sorry that you had problems. I just looked on several auto parts websites and they show the mufflers are unavailable. I wonder if Walker has stopped making them for good?

[Bushwack]

Just for people's information: I just ordered the Walker 18240 Sound FX muffler from the Reatta store, and got a cancellation notice saying that the part was out of stock and would not be back. Disappointing!

Will this do from eBay - Walker 18240 Direct Fit Muffler | eBay

[DH Comet]

Nice find - I jumped on it and it's winging its way to me now. I look forward to a renewed, quieter Reatta!

Thanks

[Bushwack]

Nice find - I jumped on it and it's winging its way to me now. I look forward to a renewed, quieter Reatta!

Thanks

I find myself shopping more on eBay and less on Amazon. Prices are often a bit less and..well...let me just say I don't trust how the state of California spends my tax dollars.

[Ronnie]

I find Amazon prices to be consistently cheaper on the Reatta parts they have for sale. In the case of this muffler the difference is $57.86 for Amazon versus $72.30 on eBay. That is fairly significant for most people. The muffler is out of stock now in both places. No tax collected by Amazon here in Tennessee now but it's coming soon.

[buickguy62]

eBay shows Walker 18240, $41.17 + shipping http://www.ebay.com/itm/Walker-18240-Direct-Fit-Muffler-Exhaust-New-/231005980953?pt=Motors_Car_Truck_Parts_Accessories&hash=item35c9078919&vxp=mtr#ht_2240wt_1141 they had 2, just bought one, one left.

[drtidmore]

Sort of surprised to hear that others are having to replace the factory muffler. The entire factory exhaust system on the Reatta was stainless steel and as such seldom fail. I am curious as to what prompted those that have already replaced the muffler to do so. My '89 is still running the factory original and I can't detect any rust outside the muffler and the exhaust noise is virtually nonexistent.

David T

[zoltanb]

It's not called the rust belt for nothing. They do rust out.

[NCReatta]

It's not called the rust belt for nothing. They do rust out.

Yes, despite being stainless, that does not make them immune to the cancer we call rust.

Both my 'verts are rust free cars (one from SC and the other from CA. Both still running factory OEM mufflers and no problems at all.

[buickguy62]

This is my first Reatta, a 1990 Convertible, just drove it home 200 miles from northern Michigan to lower Michigan. Having lived in the rust belt all my life, I've learned that with cars, 90% of what's important about their condition are the rust issues. When I first started talking to local folks about their Reatta's I told them I was surprised that none of the Reatta's seemed to have any rust (looking at the fenders, rockers, dog legs, etc)--no rust on any in the normal sheet metal areas where you first see rust. Quickly pointed out to me that yes, they do rust, but not the external panels. After seeing some pretty bad cases, I ask for pics of the underbody, and found this clean one in Traverse City, a driveable distance. Met with the gentleman and his wife, both very nice people and after inspection and a drive, bought the car. It has good bones, needs some items, but will serve us very well. Has some noises, including what sounds like a exhaust noise, found a hole in a welded area at the inlet of the pipe to the muffler, the exhaust system has fairly siginficant 'surface' rust, not sure how deep, that's the only rust on the car--see pics. So, in this forum, the Walker 18240 looks like it will fit the 1990, so I bought one. I'll take it to a local shop and see what they recommend on the total exhaust system. Really like our Reatta, it's more refined than the MGB I just sold!! Go figure.

[padgett]

That is one of the things I like about central Florida (away from the coast), local cars have no rust. Have gotten used to being able to remove an exhaust manifold without breaking anything.

[buickguy62]

Yes, this Reatta was a Florida car for most of it's life, including trips back there from Michigan. I've found here that it helps when you store the car in a garage to put some heavy visqueen on top the concrete, helps limit the moisture that comes up from the concrete to the underbody.