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Original rear Speaker size

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Old Nov 9, 2011 | 07:57 PM
  #1  
91 Droptop's Avatar
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Engine: 355 Super Charged
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Axle/Gears: 4th gen 342
Original rear Speaker size

Does anyone know the original size of the rear speakers in the 91 convertible, I keep getting differant sizes from people
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Old Nov 10, 2011 | 05:36 PM
  #2  
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
Axle/Gears: 4th gen 342
Re: Original rear Speaker size

Can someone help a brother out? can I get an AMEM!!
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Old Nov 11, 2011 | 01:46 PM
  #3  
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From: Panhandle of Florida
Car: 85 IROC / 92 Z28 Vert / 57 210
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Transmission: T5 / T56 / 4L65E
Axle/Gears: 3:73 / 3.73 / ?.??
Re: Original rear Speaker size

i too have heard two different sizes. heard 6x9 (which is what i run in my hard top) and I've heard 5x8. all of the manuals i have (chilton, dealer, Mitchel OnDemand) say 6x9, but looking at the grill cover i don't think that can be right. i just haven't taken my side panels off yet to verify one way or another.
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Old Nov 11, 2011 | 02:09 PM
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From: Illinois
Car: 88 Iroc-Z Convertible
Engine: 305 TPI
Transmission: 700R4
Re: Original rear Speaker size

ASC put 5x7's in mine. I'm pretty sure I can squeeze in 6x9's though.
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Old Nov 11, 2011 | 07:31 PM
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From: Levittown Pa
Car: 89 Iroc Convertible
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27 Posi 9 bolt PBR
Re: Original rear Speaker size

I have a pair of stock vert speakers in my basement.If I get a chance Ill try to measure them for you
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Old Nov 11, 2011 | 08:04 PM
  #6  
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
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Re: Original rear Speaker size

Thanks guys
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Old Nov 11, 2011 | 08:07 PM
  #7  
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
Axle/Gears: 4th gen 342
Re: Original rear Speaker size

I found the original grill in a box (not bad after 12 years of storage) it is 6x9 but the hole in the panel is round so I am really confused. I went on Crutchfield and it shows from a round 5 to a 6 3/4

Last edited by 91 Droptop; Nov 11, 2011 at 08:37 PM.
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Old Nov 15, 2011 | 03:55 AM
  #8  
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From: Clovis,CA
Car: 91 Camaro RS Vert
Engine: 305 TBI
Transmission: Auto
Re: Original rear Speaker size

Mine came with a 5 1/4
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Old Nov 15, 2011 | 09:45 AM
  #9  
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From: Levittown Pa
Car: 89 Iroc Convertible
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27 Posi 9 bolt PBR
Re: Original rear Speaker size

The factory speakers I have measure 6 1/8 across and about 7 inches diagonally
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Old Nov 15, 2011 | 07:00 PM
  #10  
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
Axle/Gears: 4th gen 342
Re: Original rear Speaker size

Oh man, these answers are all differant
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Old Nov 15, 2011 | 08:54 PM
  #11  
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From: Destin, Florida
Car: 91 Trans Am Convertible
Engine: LB9 5.0 TPI
Transmission: 5 SPD
Axle/Gears: Posi Rear
Re: Original rear Speaker size

Mine were 6.5 round in a TA vert. I dont think the camaros were the same. The depth of aftermarket replacements varies significantly so best thing to do is to remove your old ones and measure before ordering anything. I replaced the OEM pieces with Rockford Fosgate units and they set in with little modification of the mounting plate. After these, I put in some Polk Audio units and I had to craft a mounting plate that moved the speaker out by about 1/2 an inch. They also fit well after this pice was added to each side. Good luck.
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Old Nov 17, 2011 | 01:48 PM
  #12  
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From: Malvern, Arkansas
Car: 90 IROC 2-92 Zs blk vert & prpl
Engine: stealth ram brodix track 1 ful port
Transmission: 700r4 4l80e
Axle/Gears: iroc 375 lokr 92 Z 277 pos vert 327
Re: Original rear Speaker size

Mine were 5x7 and were stock in my 92 Z. I put 6.5 round infinity kappa speakers back in it. Had to add a one inch spacer though since they hit the body.
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Old Nov 17, 2011 | 02:36 PM
  #13  
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From: Destin, Florida
Car: 91 Trans Am Convertible
Engine: LB9 5.0 TPI
Transmission: 5 SPD
Axle/Gears: Posi Rear
Re: Original rear Speaker size

My 6.5" rounds were original too. They had a hand cut spacer made of 1/8" thick plastic that pulled them out enough to clear the body parts in the speaker cavity. That worked OK for the Rockford's but not the Polks. Don't know why there are so many different types showing up but it looks like our cars either had 6.5 rnd, 5x7 oval, or 6x9 oval depending on the year and and make of car. Anybody have any original parts list info from 87-92 Camaros and 91& 92 FBirds?
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Old Dec 10, 2011 | 11:30 PM
  #14  
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Car: 1991 Z28 convertible camaro
Engine: 383 superram
Transmission: Level 4 Vigilante 3000
Axle/Gears: 3:42,Torsen, moser axles LPW girdle
Re: Original rear Speaker size

Mine were 5 1/4 original Ac Delco coaxial. I have replaced them with a set of Soundstream Exact 5.2 Coaxial speakers with the provided spacer without rubbing issue. But that's a while ago...Now I am considering a component replacement in a 6 1/2''. I already have an Eclipse 3 way component that I will fit on the panel while keeping the original grill for a OEM look. but I don't think a 6X9 would fit with this OE grill... In my opinion, the round speakers sounds better than an oval shaped one's
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Old Aug 10, 2025 | 02:04 PM
  #15  
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From: Enid Oklahoma
Car: 1991 Camaro RS
Engine: 305 tbi
Transmission: 700R4
Re: Original rear Speaker size

Online had told me 6x9 so I bought a pair only to find they were immensely bigger then the og ones, idk if I should just try fitting in or if anyone would know definitive answer
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Old Aug 10, 2025 | 03:03 PM
  #16  
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Original rear Speaker size

Originally Posted by mikeymyers00000
Online had told me 6x9 so I bought a pair only to find they were immensely bigger then the og ones, idk if I should just try fitting in or if anyone would know definitive answer
6x9 work just fine.
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Old Aug 10, 2025 | 08:45 PM
  #17  
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From: Winter Haven Fl
Car: 1991 Z28 convertible camaro
Engine: 383 superram
Transmission: Level 4 Vigilante 3000
Axle/Gears: 3:42,Torsen, moser axles LPW girdle
Re: Original rear Speaker size

5 1/4" oem ac delco in my 91 camaro. I enlarged the holes and was able to fit some 6 1/2" while keeping the original grill covers.
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Old Aug 10, 2025 | 09:26 PM
  #18  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: Original rear Speaker size

Thread revival. 6x9 work just fine if you like them sticking out over the arm rest. I think stock was 5 1/4...maybe. I put my 6x9s here.

So i could use 6.5 speakers in the stock location.

Last edited by 84 1LE; Aug 10, 2025 at 09:33 PM.
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Old Aug 10, 2025 | 09:28 PM
  #19  
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From: Enid Oklahoma
Car: 1991 Camaro RS
Engine: 305 tbi
Transmission: 700R4
Re: Original rear Speaker size

Originally Posted by ShiftyCapone
6x9 work just fine.
Id just like to not have to really modify anything tho
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Old Aug 10, 2025 | 09:34 PM
  #20  
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: Original rear Speaker size

Then stick to round speakers. 5-6", 6.5 is pushing it, but it'll just fit. I got rid of the grill, cause it looks cleaner and the leather is perforated.


Last edited by 84 1LE; Aug 10, 2025 at 09:37 PM.
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Old Aug 11, 2025 | 06:31 AM
  #21  
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From: Levittown Pa
Car: 89 Iroc Convertible
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27 Posi 9 bolt PBR
Re: Original rear Speaker size

Originally Posted by mikeymyers00000
Id just like to not have to really modify anything tho
I have a couple pairs of stock convertible speakers here
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