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Sub Woofer Replacement Speaker $44.95

Subwoofer Speaker Kit



Includes a New Sub Woofer Speaker, New OEM plate gasket (to replace the old original gasket), Custom Die-Cut Gasket (to provides an air tight fit equal to the original factory design), and all the necessary hardware to install into the OEM enclosure.


This is now my new sub speaker. I had these custom made and they easily exceed the GM factory sub speaker.  We optimized it in everyway possible. 




Just thought I'd check back in with the order and say I've got it installed and this little sub actually kicks ass for what it is! Very impressed - thank you!

Christian K Samsel




How powerful is the Fiero sub system? Not very but it adds a lot of additional richness to the sound quality.


This is a true sub woofer speaker.



Sub Speaker (front)Sub Speaker (back)Gaskets : Custom Spacer (top), OEM (bottom)

  • A True Sub Woofer Speaker
  • Paper Cone w/ butyl rubber surround
  • Shielded Magnet
  • Frequency Response 45 - 15,000 hz
  • 4 Ohm Nominal Resistance
  • 60 Watts RMS
  • 87db Sensitivity

Mounts on the top of the steel ring. Not below it like OEM. The custom spacer gasket is to retain the air tight system since the old speaker is not there to make that seal.

The OEM sub woofer speaker was designed to fit in the Fiero sub woofer housing and has a unique design and it is unlikely that this speaker will ever be reproduced. This necessitates the need to mount an aftermarket sub woofer speaker on the top of the steel ring in the OEM housing assembly, hence the space left from removing the old OEM speaker which needs to be filled into create a airtight design by using the spacergasket.


Note : Some minor modification to the steel housing (small holes drilled) will be needed to mount the new sub speaker. This modification is inside the housing and will not be visible after installation.

Gaskets are sold separately: They are available separately if you find a sub speaker you prefer instead of mine. Click here for the gaskets sold separately.



Shipping:   This fits into a USPS postal flat rate box and shipping is $15.25 (USA) 

Final shipping cost is determined by weight of the item(s) and distance from Milwaukee, WI. Shipping prices quoted are for items shipped to the Midwest area in the USA. If you are ordering a single item or multiple items the total shipping price is determined after you place the order. I try to keep my shipping prices to a minimum and use Postal Flat Rate boxes whenever I can utilize them for an order.




I do not offer free shipping.

Because I use postal flat rate boxes for heavy orders there is no program that can add the proper amount of shipping to every order. So all shipping is added manually by myself after you place your order. That is explained here: Shipping added later explanation 

When you place an order the shipping amount will show $0.00. Soon after you place an order you will receive an email confirmation that shows the amount of shipping that was added to your order.


This product was updated on Saturday 26 October, 2019.
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