PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB

Xtreme EnclosuresCustom Built: Estimated lead time of 20-40 Business days.

SKU: PORT GMEC99 DUAL 8 sm

In Stock

$362.70 $544.05

Save $181.35

1999-2006 GMC SIERRA EXTENDED CABS

Vented box
Fits dual 8 inch subwoofers
Mounting depth = 7 inches
Air Space = 1.7 cubic ft
Tuned to 35hz
MDF wood
Charcoal carpet
Available in OEM colors
choose which side of rear seat you wish to place sub box. Option available below.
speaker terminal included. Terminal shipped uninstalled due to risk of damage during shipping. It is individually wrapped and located inside the sub box.

NOTE: Boxes are carpeted in charcoal. OEM carpet colors available as option for additional cost.

NOTE: Make sure your subwoofer will work with the air space we listed. If not sure just ask us.

Popular subs customer use for this box:

JL Audio TW3
JL 8W1v3
JL 8W0
Alpine SWRT
Kicker CVT CompRT Comp CompD and CompS
Sundown E series

When you order this sub box please provide us with your sub model # if you have subs already. You can type the sub model # in the comment section of the order page. This ensures we cut the holes to match your subwoofers since several subs have different hole diameters.

Hole cutouts:

Standard hole cutout diameter for 8s = 7 inches
If you dont know the actual hole cutout diameter choose the standard cutout below.
If we dont have your actual diameter listed below choose the standard cutout then provide us with your sub model #. No worries we can look up the specs of your subs.

Our sub boxes are built by us! CNC precision cut and assembled by hand.

We guarantee our sub box will not fall apart.

Our competitors sell cheap pre-fab sub boxes that cant match or beat the strength and sound of our speaker boxes.

You will not be disappointed with our sub box.

NOTE:

Customers need to check their subwoofers specifications to see if they will fit the sub box. Customers may contact us if they are not sure.
Customers are responsible for providing us with their subwoofer model # at the time of purchase so we can ensure it will fit.
If customer doesnt have a subwoofer at the time of purchase then ask us for our recommendation as to which subs will fit.
We cant be held liable if a customer chooses a subwoofer larger than the specs provided for our sub box.

{"id":8573371318521,"title":"PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB","handle":"ported-dual-8-box-1999-2006-gmc-sierra-extended-cab","description":"\u003cp\u003e1999-2006 GMC SIERRA EXTENDED CABS\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVented box\u003c\/li\u003e\n\u003cli\u003eFits dual 8 inch subwoofers\u003c\/li\u003e\n\u003cli\u003eMounting depth = 7 inches\u003c\/li\u003e\n\u003cli\u003eAir Space = 1.7 cubic ft\u003c\/li\u003e\n\u003cli\u003eTuned to 35hz\u003c\/li\u003e\n\u003cli\u003eMDF wood\u003c\/li\u003e\n\u003cli\u003eCharcoal carpet\u003c\/li\u003e\n\u003cli\u003eAvailable in OEM colors\u003c\/li\u003e\n\u003cli\u003echoose which side of rear seat you wish to place sub box.  Option available below.\u003c\/li\u003e\n\u003cli\u003espeaker terminal included.  \u003cspan style=\"text-decoration: underline; background-color: #ffff00;\"\u003e\u003cem\u003e\u003cstrong\u003eTerminal shipped uninstalled due to risk of damage during shipping. It is individually wrapped and located inside the sub box.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE: Boxes are carpeted in charcoal. OEM carpet colors available as option for additional cost.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE: Make sure your subwoofer will work with the air space we listed. If not sure just ask us.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePopular subs customer use for this box:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJL Audio TW3\u003c\/li\u003e\n\u003cli\u003eJL 8W1v3\u003c\/li\u003e\n\u003cli\u003eJL 8W0\u003c\/li\u003e\n\u003cli\u003eAlpine SWRT\u003c\/li\u003e\n\u003cli\u003eKicker CVT CompRT Comp CompD and CompS\u003c\/li\u003e\n\u003cli\u003eSundown E series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you order this sub box please provide us with your sub model # if you have subs already. You can type the sub model # in the comment section of the order page. This ensures we cut the holes to match your subwoofers since several subs have different hole diameters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHole cutouts:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard hole cutout diameter for 8s = 7 inches\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eIf you dont know the actual hole cutout diameter choose the standard cutout below.\u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eIf we dont have your actual diameter listed below choose the standard cutout then provide us with your sub model #.  No worries we can look up the specs of your subs.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur sub boxes are built by us! CNC precision cut and assembled by hand.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWe guarantee our sub box will not fall apart.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur competitors sell cheap pre-fab sub boxes that cant match or beat the strength and sound of our speaker boxes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou will not be disappointed with our sub box.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eNOTE:  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eCustomers need to check their subwoofers specifications to see if they will fit the sub box.  Customers may contact us if they are not sure.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eCustomers are responsible for providing us with their subwoofer model # at the time of purchase so we can ensure it will fit.  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eIf customer doesnt have a subwoofer at the time of purchase then ask us for our recommendation as to which subs will fit.  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eWe cant be held liable if a customer chooses a subwoofer larger than the specs provided for our sub box.\u003c\/strong\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2019-08-02T13:30:28-04:00","created_at":"2024-10-23T19:41:28-04:00","vendor":"Xtreme Enclosures","type":"","tags":[],"price":36270,"price_min":36270,"price_max":36270,"available":true,"price_varies":false,"compare_at_price":54405,"compare_at_price_min":54405,"compare_at_price_max":54405,"compare_at_price_varies":false,"variants":[{"id":45619667239161,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"PORT GMEC99 DUAL 8 sm","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB","public_title":null,"options":["Default Title"],"price":36270,"weight":15876,"compare_at_price":54405,"inventory_management":null,"barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/PORT_GMEC99_8.2__24431__68540.jpg?v=1729726890","\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/Port_GMEC99_8.2_install__76470__32755.jpg?v=1729726890"],"featured_image":"\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/PORT_GMEC99_8.2__24431__68540.jpg?v=1729726890","options":["Title"],"media":[{"alt":"PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB","id":36001372209401,"position":1,"preview_image":{"aspect_ratio":1.773,"height":722,"width":1280,"src":"\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/PORT_GMEC99_8.2__24431__68540.jpg?v=1729726890"},"aspect_ratio":1.773,"height":722,"media_type":"image","src":"\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/PORT_GMEC99_8.2__24431__68540.jpg?v=1729726890","width":1280},{"alt":"PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB","id":36001372242169,"position":2,"preview_image":{"aspect_ratio":1.778,"height":720,"width":1280,"src":"\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/Port_GMEC99_8.2_install__76470__32755.jpg?v=1729726890"},"aspect_ratio":1.778,"height":720,"media_type":"image","src":"\/\/store.soundsolutionsaudio.com\/cdn\/shop\/files\/Port_GMEC99_8.2_install__76470__32755.jpg?v=1729726890","width":1280}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e1999-2006 GMC SIERRA EXTENDED CABS\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVented box\u003c\/li\u003e\n\u003cli\u003eFits dual 8 inch subwoofers\u003c\/li\u003e\n\u003cli\u003eMounting depth = 7 inches\u003c\/li\u003e\n\u003cli\u003eAir Space = 1.7 cubic ft\u003c\/li\u003e\n\u003cli\u003eTuned to 35hz\u003c\/li\u003e\n\u003cli\u003eMDF wood\u003c\/li\u003e\n\u003cli\u003eCharcoal carpet\u003c\/li\u003e\n\u003cli\u003eAvailable in OEM colors\u003c\/li\u003e\n\u003cli\u003echoose which side of rear seat you wish to place sub box.  Option available below.\u003c\/li\u003e\n\u003cli\u003espeaker terminal included.  \u003cspan style=\"text-decoration: underline; background-color: #ffff00;\"\u003e\u003cem\u003e\u003cstrong\u003eTerminal shipped uninstalled due to risk of damage during shipping. It is individually wrapped and located inside the sub box.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE: Boxes are carpeted in charcoal. OEM carpet colors available as option for additional cost.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE: Make sure your subwoofer will work with the air space we listed. If not sure just ask us.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePopular subs customer use for this box:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJL Audio TW3\u003c\/li\u003e\n\u003cli\u003eJL 8W1v3\u003c\/li\u003e\n\u003cli\u003eJL 8W0\u003c\/li\u003e\n\u003cli\u003eAlpine SWRT\u003c\/li\u003e\n\u003cli\u003eKicker CVT CompRT Comp CompD and CompS\u003c\/li\u003e\n\u003cli\u003eSundown E series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you order this sub box please provide us with your sub model # if you have subs already. You can type the sub model # in the comment section of the order page. This ensures we cut the holes to match your subwoofers since several subs have different hole diameters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHole cutouts:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard hole cutout diameter for 8s = 7 inches\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eIf you dont know the actual hole cutout diameter choose the standard cutout below.\u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eIf we dont have your actual diameter listed below choose the standard cutout then provide us with your sub model #.  No worries we can look up the specs of your subs.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur sub boxes are built by us! CNC precision cut and assembled by hand.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWe guarantee our sub box will not fall apart.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur competitors sell cheap pre-fab sub boxes that cant match or beat the strength and sound of our speaker boxes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou will not be disappointed with our sub box.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eNOTE:  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eCustomers need to check their subwoofers specifications to see if they will fit the sub box.  Customers may contact us if they are not sure.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eCustomers are responsible for providing us with their subwoofer model # at the time of purchase so we can ensure it will fit.  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eIf customer doesnt have a subwoofer at the time of purchase then ask us for our recommendation as to which subs will fit.  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eWe cant be held liable if a customer chooses a subwoofer larger than the specs provided for our sub box.\u003c\/strong\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e"}

Add to wishlist

Add to compare

Payment Options

If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.

Customer service

All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com

Sale & Press

If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com

1999-2006 GMC SIERRA EXTENDED CABS

Vented box
Fits dual 8 inch subwoofers
Mounting depth = 7 inches
Air Space = 1.7 cubic ft
Tuned to 35hz
MDF wood
Charcoal carpet
Available in OEM colors
choose which side of rear seat you wish to place sub box. Option available below.
speaker terminal included. Terminal shipped uninstalled due to risk of damage during shipping. It is individually wrapped and located inside the sub box.

NOTE: Boxes are carpeted in charcoal. OEM carpet colors available as option for additional cost.

NOTE: Make sure your subwoofer will work with the air space we listed. If not sure just ask us.

Popular subs customer use for this box:

JL Audio TW3
JL 8W1v3
JL 8W0
Alpine SWRT
Kicker CVT CompRT Comp CompD and CompS
Sundown E series

Hole cutouts:

Standard hole cutout diameter for 8s = 7 inches
If you dont know the actual hole cutout diameter choose the standard cutout below.
If we dont have your actual diameter listed below choose the standard cutout then provide us with your sub model #. No worries we can look up the specs of your subs.

Our sub boxes are built by us! CNC precision cut and assembled by hand.

We guarantee our sub box will not fall apart.

Our competitors sell cheap pre-fab sub boxes that cant match or beat the strength and sound of our speaker boxes.

You will not be disappointed with our sub box.

NOTE:

Customers need to check their subwoofers specifications to see if they will fit the sub box. Customers may contact us if they are not sure.
Customers are responsible for providing us with their subwoofer model # at the time of purchase so we can ensure it will fit.
If customer doesnt have a subwoofer at the time of purchase then ask us for our recommendation as to which subs will fit.
We cant be held liable if a customer chooses a subwoofer larger than the specs provided for our sub box.

Shipping
We deliver your parcel within 2–3 working days. As soon as your package has left our warehouse, you will receive a confirmation by email. This confirmation contains a tracking number that you can use to find out where your package is.

Returns
We offer free returns within 30 days. All you have to do is fill out the return slip that you received in your package and stick the prepaid label on the package.Please note that it can take 2 weeks for us to process your return. We will do our best to complete this process as soon as possible.

We provide a 2-year limited warranty, from the date of purchase for all our products.

If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.

This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

We accept payments with :
Visa, MasterCard, American Express, Paypal, Diners Club, Discover and more.

PORTED DUAL 8 BOX - 1999-2006 GMC SIERRA EXTENDED CAB

Customer service

Sale & Press

Customer service

Sale & Press

Related Products

Support Hotline