I'm looking for a stock oem muffler for my 87 GN, If I went through GM to get a muffler, would it be the same as the original that is on there. Did they make any changes to it. I'm a purist at heart and want to keep my car as stock as I can. Thanks
OEM muffler
- Thread starter mrchris27
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
b4black
Well-Known Member
- Joined
- May 24, 2001
- Messages
- 3,773
Before you wonder if it's exactly the same or not, you should check to see if it's even still available. I don't think GM stock exhaust parts too long. 
Also the stock muffler isn't the hot set-up for a good runing car. I used to be a "purist" too, then I realised how dumb it was to preserve stuff that doesn't deserve preserving. The stock exhaust is one of those things.
With T-R's, there are so many "less than 100 mile cars" out there that trying to keep a car 100% stock with any more miles that this becomes an expensive and futile situation. You can waste time and money scouring the country for a stock muffler, etc., pay too much and when you are done making a the car 100% stock, your 50K or 100K mile car has more in it than you could go out an buy a 100 mile car for.
If I had a choice between to 50K mile cars, one was 100% stock and one was 100% stock but had a stainless steel exhaust with low back pressure mufflers, I know which one I would buy. It's like getting a Free 30 hp.
A lot of people misunderstand the beauty of the turbo regal. Eventually they will see the light, however (usually it's right after their 100% stock GN gets wasted by a 4 cylinder crapbox) It isn't what the car did stock that makes it worth anything anymore, it what they can do with very little modifications.
If you have your heart set on a stock muffler, I'm sure there are a lot of them sitting in peoples garages in good used condition. Post a parts wanted add and see what you can find.
With T-R's, there are so many "less than 100 mile cars" out there that trying to keep a car 100% stock with any more miles that this becomes an expensive and futile situation. You can waste time and money scouring the country for a stock muffler, etc., pay too much and when you are done making a the car 100% stock, your 50K or 100K mile car has more in it than you could go out an buy a 100 mile car for.
If I had a choice between to 50K mile cars, one was 100% stock and one was 100% stock but had a stainless steel exhaust with low back pressure mufflers, I know which one I would buy. It's like getting a Free 30 hp.
A lot of people misunderstand the beauty of the turbo regal. Eventually they will see the light, however (usually it's right after their 100% stock GN gets wasted by a 4 cylinder crapbox) It isn't what the car did stock that makes it worth anything anymore, it what they can do with very little modifications.
If you have your heart set on a stock muffler, I'm sure there are a lot of them sitting in peoples garages in good used condition. Post a parts wanted add and see what you can find.
- Joined
- Jul 20, 2001
- Messages
- 2,205
Listen to UNGN, because he makes a lot of sense. I just called the local Buick dealer and the part has been discontinued. 1 1/2 years ago my factory muffler blew out. I searched for a factory unit and it was still available for hundreds of dollars. I also made a request at the local muffler shop. For the same price of a replacement type factory muffler (local muffler shop), they instlled two mufflers in front of the rear axle and installed new tailpipe(over the axle) in the factory location. Now mines isn't the 2 1/2 diameter system that most (on the board) use, but it sure woke the car up and it looks stock. IMHO you can be a purist to a point, but most people will not notice you don't have the restrictive crossflow muffler on your vehcle.
Turbo Brian
What do I type here?
- Joined
- May 24, 2001
- Messages
- 574
If your quest for a stock muffler or stock replacement comes up short, here are some ideas:
The original muffler is a crossflow model. Some F body cars used a crossflow design because of space limitations. Maybe one of these designs will have similar dimensions and will work in your application. Understand that exhaust flow was also a problem in those cars and you might detune your car due to exhaust restriction.
Another idea: One Pontiac vendor came up with a design that fit in the stock location on the firebirds that increased flow. The vendor took two glasspack mufflers of the correct length and pipe diameter, and positioned them together using welded steel straps to make a one piece high performance replacement.
Just trying to stimulate some thoughts. Good luck!
The original muffler is a crossflow model. Some F body cars used a crossflow design because of space limitations. Maybe one of these designs will have similar dimensions and will work in your application. Understand that exhaust flow was also a problem in those cars and you might detune your car due to exhaust restriction.
Another idea: One Pontiac vendor came up with a design that fit in the stock location on the firebirds that increased flow. The vendor took two glasspack mufflers of the correct length and pipe diameter, and positioned them together using welded steel straps to make a one piece high performance replacement.
Just trying to stimulate some thoughts. Good luck!
