1990 Firebird Aero Wing
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Junior Member

Joined: Jan 2022
Posts: 21
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From: Michigan
Car: 1990 Pontiac Firebird Formula
Engine: 5.0 Liter 305
1990 Firebird Aero Wing
So, like everyone else, my spoiler on my 1990 Firebird is all split and looks less than desirable. I believe that there is no way to fix this, so is my only option getting a fiberglass spoiler from Hawks? I live in Michigan and was hoping someone around here had a fiberglass one.
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Joined: Jul 2021
Posts: 79
Likes: 61
From: Janesville, WI
Car: 1989 Trans Am GTA
Engine: 5.7 TPI
Transmission: 700R4
Re: 1990 Firebird Aero Wing
I feel that the factory ones are cracking and splitting for a reason, I think that even if you were to fiberglass and epoxy it, you're likely to see it occur again over time. How much time? Hard to say.
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Junior Member

Joined: Jan 2022
Posts: 21
Likes: 0
From: Michigan
Car: 1990 Pontiac Firebird Formula
Engine: 5.0 Liter 305
Re: 1990 Firebird Aero Wing
That’s what my thinking was too. I guess I’ll have to just bite the bullet and get an aftermarket fiberglass one from Hawks.
Joined: Oct 2001
Posts: 12,219
Likes: 1,141
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 1990 Firebird Aero Wing
Fiberglass wouldn't be a good fix for a foam rubber endura type product. They have a steel frame inside that rubber, it absorbs water, rusts the frame then expands and splits the foam. Then more water, rust and splits.
Re: 1990 Firebird Aero Wing
if anyone has purchased the hawks wing i would be interested to know the weight of that unit vs the stock type. i will most likely be purchasing one in the future regardless, as mine is pretty shot.
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Joined: Apr 2014
Posts: 116
Likes: 37
From: Springfield, Ohio
Car: Bright Red 1989 Firebird Formula
Engine: LB9 5.0L TPI
Transmission: MM5 5 Speed Manual
Axle/Gears: 3.45
Re: 1990 Firebird Aero Wing
The fiberglass wing weighs about 25% of the original (estimated). I have used two of the fiberglass replacements on two Formulas and I highly recommend them.
Joined: Sep 2001
Posts: 303
Likes: 82
From: T E X A S
Car: 93 Trans Am
Engine: LT1
Transmission: T56 Street Twin
Axle/Gears: 12 Bolt 3.90
Re: 1990 Firebird Aero Wing
There was a guy on here who fixed one, but they were in Europe so the labor cost was justified versus freight and taxes he would have to pay. The Hawks fits the best believe OER has a version that others have complained about.
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Joined: Feb 2001
Posts: 586
Likes: 25
From: So. Cal
Car: '89 GTA, '15 Camaro LS 6sp.
Engine: L98, LFX.
Transmission: 4L60, AY6.
Axle/Gears: 3.27's.
Re: 1990 Firebird Aero Wing
I fixed my original aero wing and it just cracked and split open again. The bare metal structure inside rusts from moisture and then swells up splitting the urethane skin formed around it. There’s no way to permanently fix it unless you removed all the metal. However, if you did that, it would probably make it too flimsy or floppy to hold shape when bolted to the rear deck lid. If GM had used galvanized coated steel for the metal support structure, then we wouldn’t be having this problem.
Joined: Oct 2001
Posts: 12,219
Likes: 1,141
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 1990 Firebird Aero Wing
I'd think the only way to fix it would be remove the steel, replace it with stainless steel then use the 3m stuff to fix the rubber
Senior Member


Joined: Feb 2001
Posts: 586
Likes: 25
From: So. Cal
Car: '89 GTA, '15 Camaro LS 6sp.
Engine: L98, LFX.
Transmission: 4L60, AY6.
Axle/Gears: 3.27's.
Re: 1990 Firebird Aero Wing
Maybe if you had two junk spoilers, it could work. However, for all the time and effort that would require, I’d rather just have the aftermarket fiberglass version than a hacked out original that’s refilled with 10lbs of 3m urethane. lol!
If the splitting and cracking problem was in one little area, it wouldn’t be that bad. However, to permanently fix these things, you’d have to replace the whole metal structure inside or keep the car stored in a dry environmentally controlled garage.
Last edited by Mikos_89; Jan 29, 2022 at 08:29 PM.
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