zBox GMC8FF Dual 8″ Under-Seat Ported Box for GMC
Under-seat dual 8-inch face-front dual-port box for GMC 2014–up
$219.99
Overview
Looking for ported bass under the seat? zBox GMC8FF is a ported dual-sub enclosure with dual ports for GMC 2014-up. The baffle faces forward under the seat. Side terminal access keeps the amp run tidy on the finished cabinet. Available in 8 inch. Empty box only — woofers and amp are sold separately.
Product details
Ported dual-sub for GMC 2014-up
GMC8FF is a ported dual-sub enclosure with dual ports for GMC 2014-up. The baffle faces forward under the seat.
Fitment
Fitment: GMC 2014-up. Confirm cab, seat, and clearance on your vehicle before ordering.
Build
MDF construction with dual ports. Side terminal access where the design includes it.
Sizing
Available in 8 inch. Confirm fit before ordering. Enclosure only.


Key features
- Ported dual-sub enclosure for GMC 2014-up
- Face front under the seat
- MDF construction
- Available in 8 inch
- Made in the USA
- Empty enclosure; load your own drivers
Specifications
| Weight | 37 lbs |
|---|---|
| Dimensions | 55 × 9.25 × 15 in |
| Size | 8 inch |
| Enclosure Type | Empty |
| Vehicle Make | GM |
| Box Style | Ported |
| Model | GMC8FF |
| Configuration | Dual sub under seat face front port |
| Acoustic design | Ported |
| Construction | MDF |
| Terminal | Side-mounted speaker terminal cup |
| Fitment | GMC 2014 and newer |
| Origin | Made in the USA |
| Parent SKU | GMC8FF |
| Variation SKUs | 08GMC8FF |
| Product type | Empty ported subwoofer enclosure |
| Mount | Under seat |
| Cutout sizes | 8 inch |
Important notes
Under-seat face-front dual-port fit; 8 inch only. Enclosure only.
What's in the box
- One empty GMC8FF enclosure (8 inch)
Manuals and downloads
None.

