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Metra 82-358C Speaker Mounting Brackets

Install 3-1/2" speakers in select factory 4"x6" speaker openings

8 Reviews | 1 question - 2 answers

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Item # 12082358

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Metra's 82-358C brackets will allow you to install select 3-1/2" speakers into the 4"x6" factory speaker openings of many vehicles. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to confirm that these adapters are compatible with your vehicle. Warranty: 60 days.

Great product for mounting 3 1/2" speakers in the stock 4" x 6" slot

Greg, White Lake, MI

What's in the Box:

  • Two speaker adapter brackets
  • Twelve 1/2" Screws
  • 12 Speed clips
  • Instructions

Metra 82-358C Speaker Mounting Brackets Reviews

Average Customer Review(s):

(8 Reviews)

2002 Silverado

Greg from White Lake, MI on 2/12/2017

2002 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great product for mounting 3 1/2" speakers in the stock 4" x 6" slot

Pros: Easy to use Good fit


Perfect adaptor

Joseph from Buford GA on 1/21/2017

1994 Chevrolet C Series
Crutchfield Customer Review (What's this?)

The perfect adaptor

Pros: Making install a cinch

Cons: None

Metra 82-358C Speaker Mounting Brackets

Anonymous from Massachusetts on 1/2/2016

1994 Chevrolet Blazer
Crutchfield Customer Review (What's this?)

These made installing round speakers in my dash super easy

Pros: work great

Cons: none

Metra speaker adapter

Mike C. from Lake Zurich on 10/21/2015

Crutchfield Customer Review (What's this?)

These are a fantastic product in order to adapt round speakers into a automotive factory mount for normally sized 4x6 speakers.

Pros: Universal. All auto manufacturers use different adapters, and hole alignments. These fit the need perfectly

Cons: None, easy and versatile.

Great devices

Agen from Middletown Del on 10/16/2015

2001 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Great item had to drill to fit my speakers and vehicle but awesome all the same.

Pros: Durable plastic and handled the drilling for new holes easily

Cons: Could have holes pre drilled

They do what they are supposed to

Josh S from NH on 5/8/2015

2003 GMC Sierra Denali
Crutchfield Customer Review (What's this?)

I ordered these on accident, needed 4" adapter but these were right above them in the product list and I didn't pay attention to the description. They are straight forward to use and will work if you have 3.5" speakers to fit in a 4x6 opening. If you're a dope like me and you have 4" speakers, get the scoshe adapters. I have used these metra adapters before, on my last Sierra in the extended cab doors, and they do what they are designed to do and come with all hardware you may need. They don't come with instructions but honestly you shouldn't need them. Have a drill handy as you will most likely need to drill holes on the vehicle panel to mount these, then speaker screws right onto adapter.

Pros: Easy to install (may need to drill)

Cons: None

Worked great

Anonymous from Kendallville, IN on 5/20/2013

1994 GMC Suburban
Crutchfield Customer Review (What's this?)

Worked great and were free with my 3.5 speakers



Metra 82-358C Speaker Mounting Brackets

Anonymous from surprise, az on 3/6/2013

1989 Chevrolet C Series
Crutchfield Customer Review (What's this?)

they fit.. i was hoping i would be able to fit my speakers in while having my stock speaker grills flush mounted. this didnt happen...i mounted the 3 1/2 INCHES speakers below the brackets to fit




Hands-on research

Product Research


Overview: This bracket is designed to allow replacement of factory speakers in certain GM vehicles with select aftermarket 3-1/2" speakers. (Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.)


  • Cutout Diameter: 3.17"
  • Height: 0.125"
  • Diagonal Hole Spacing: 3.87"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Only type available to adapt 3 1/2" speakers into a 4x6 opening.[ Kurt  Aug 01, 2017 ]
to place rockville tweeters in the dash of my 1999 Jeep Wrangler[ Malik  May 24, 2017 ]
These are needed to mount the speakers in my dash.[ Irving  Dec 17, 2016 ]
Quality brands for great prices[ Adam  Nov 23, 2016 ]
Must have[ terence  Nov 17, 2016 ]
got it to fill the gaps that would be left after the install.[ DEVIN M  Apr 27, 2016 ]
Free equipment to help get me going[ Ryan  Mar 31, 2016 ]
Needed for clean install. Perfect fit.[ RODNEY  Jan 15, 2016 ]
Crutchfield recommended it.[ George  Dec 04, 2015 ]

1 question already asked

Yes , I used these to install dash mounted speakers in my brother's Chevy truck.[ GEORGE T  Jan 27, 2014 ]
I am not entirely sure but this is a universal bracket so is should have screw holes that line up, just like it did in my 88 chevy truck[ andrew vargas  Jan 26, 2014 ]

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