What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.
Body styles covered: Regular Cab, Double Cab, Crew Cab
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | underseat storage compartment, crew cab (2007-2018 shared this cavity per aftermarket storage-drawer sourcing) |
|---|---|
| Outer bounding box | 54"W x 13"D x 6.5"H (rear) tapering up to 9.5"H (front) |
| Known obstructions | None specifically documented beyond the height taper front-to-rear already captured in the bounding box |
| Usable volume estimate | 3 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" or 1x12" sealed |
|---|---|
| Box type | sealed |
| Location | under rear seat |
| Subwoofers | 2x8" ported (real named option: Skar Audio vehicle-specific enclosure) or 2x10" downfire loaded (Subthump/AudioControl) |
|---|---|
| Box type | ported or sealed loaded |
| Location | under rear seat |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | factory oval, compatible with 5.25"/6.25"/6.5" aftermarket via adapter |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | yes |
| Factory speaker size | 6-3/4" — same size for Crew Cab (full-size rear doors) and Double Cab (slightly smaller rear doors) |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Factory amp / premium audio | Bose 7-speaker available starting at LT trim (later model years); base trims have no factory amp |
|---|---|
| Adding subs without a head-unit swap | Standard LOC tap should work on non-Bose trims. Bose-equipped trims need a Bose-specific adapter, not a generic LOC — verify trim before recommending a part. |
| Head unit | No replacement needed |
Real builder box referenced below: underseat dual 8" box, ~2 cu ft internal, tuned 32Hz. Full interior cavity dimensions not yet independently measured — box was designed around the specific sub pair, not a generic max-fit cavity spec.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.