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’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.

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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
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• 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”.

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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.

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