Muffler I.D. & Search

[BFlat]

’87 Ltd. Drone is too much & wanted Magnaflows. Don't want to replace the whole system.. Nothing would fit without re-doing pipes. What are these GMs mufflers that are on the car now, and any ideas what to replace them with that will fit? Mufflers are straight through & small. 3 3/4” high, 8” wide, 12” long.

 

[1986 Buick GX1]

Here is some good information.

B

Thread 'Quick Question About The Original Gnx Exhaust System'

Jul 24, 2009

Hello Everyone....just Read A Post About The Gnx Exhaust. I Have A 1987 Grand National In Which I Replaced The Original Exhaust System About 7 Years Ago Due To Leaks, Condensation, Etc...i Wanted To Keep The Original Look As Much As Possible And Decided To Order A New Hurst Olds Exhaust System That At The Time Maybe In The Late 90's Early 2000 I Managed To Be One Of The Very Few Owners Of This Exhaust Systm Due To Them Being Discontinued. Is The Hurst Olds Exhaust System The Same As The Gnx. The 2 Mufflers Both Have Dent Likes On Either Sides With The Little Pin Hole At The Back Of The...

• BUICKGNX
• Replies: 21
• Forum: GNX - The fortunate 547

Magnaflow makes a center in/ center out muffler that’s 5”x 8” but is 14” long.
The corner could be cut off and a plate welded on to make it fit.
Maybe trimming the tailpipe and the inlet/ outlet pipe would help.
I’m assuming the pipes are 2 1/4”.

MagnaFlow 12215 MagnaFlow Performance Mufflers | Summit Racing

Free Shipping - MagnaFlow Performance Mufflers with qualifying orders of $109. Shop Mufflers at Summit Racing.

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Vibrant makes some ultra quiet resonators that may work as well.
This one is 4 3/4”x 6 1/2”x 9 3/4” long.
A pipe will have to be added to the front side for length, and move the resonator to the back. It might clear without cutting the corner off.
One of the guys ran these, but thought it was too quiet.

Vibrant Performance 1140 Vibrant Performance Ultra-Quiet Resonators | Summit Racing

Free Shipping - Vibrant Performance Ultra-Quiet Resonators with qualifying orders of $109. Shop Resonators at Summit Racing.

www.summitracing.com

 

[BFlat]

Thanks!

 

[BFlat]

That's interesting stuff, and it sounds like they stuck a GNX exhaust on my Ltd.. Yes? Wish I could see the pics attached to some of the replies. I wonder if these mufflers would be worth anything to GNX owners.

 

[1986 Buick GX1]

It sounds like they used the ‘87 442 mufflers/ resonators on the GNX with different tailpipes to work with the GNX suspension.
Maybe replacement 442 mufflers/ resonators would be the same as what you have?
Keep in mind the straight through perforated core mufflers make more power than a turbo style or chamberd muffler.

I prefer the Borla mufflers as they seem to use a heavier more dense packing material for a deeper tone than other brands.
Many have said the XR1 race muffler sounds and performs the most like the original ATR Pitbull Power slot mufflers, but the smallest is 2.5”.

Borla 40941 Borla XR-1 Racing Mufflers | Summit Racing

Free Shipping - Borla XR-1 Racing Mufflers with qualifying orders of $109. Shop Mufflers at Summit Racing.

www.summitracing.com

 

[Pronto]

I'ld go with Pypes Race mufflers.