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: King 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, crew cab |
|---|---|
| Outer bounding box | 49.25"W x 6.5"H x 13.25"D — this is effectively the same figure as the audio-industry reference build already in this entry (AK Audio), cross-confirmed by generic storage-industry products (DU-HA) also molded to fit both King Cab and Crew Cab across a similarly wide 2004-2024 span |
| Known obstructions | None specifically documented |
| Usable volume estimate | 1.3 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" or 1x10" sealed, under-seat dual chamber |
|---|---|
| Box type | sealed |
| Location | under rear seat |
| Subwoofers | 2x12" ported (Skar Audio) |
|---|---|
| Box type | ported |
| 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 | 6.5" and 6x9" (varies by trim) — a real Metra 82-7402 adapter bracket product exists specifically to install 6x9" speakers in the factory front opening, confirming this is a known, catalogable swap |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | yes for 6x9" upgrades (Metra 82-7402) |
| Factory speaker size | 6.5" — described as 'a fairly easy swap' |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | no |
| Tweeter | n/a — tweeter is dash-corner, front only |
| Factory amp / premium audio | Real, specific hardware spec confirmed since this generation's 2016 launch (including the Titan XD variant, which showcased it at launch). Rockford Fosgate premium system: 420W, 12 speakers. Exact trim gating not independently confirmed, but the system itself and its launch year are solid. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — direct under-seat products exist |
| Head unit | No replacement needed |
Real specific full spec: under-seat dual chamber, 49.25"W x 6.5"H x 13.25"D, 0.65 ft3/chamber (1.3 ft3 total), fits 8"/10"/12". Dual sealed variant: 1.87 ft3 total (0.94 ft3/sub), 5.5" mounting depth (up to ~6.25" with metal back plates for extra clearance). Skar Audio's dual-12" ported is the enthusiast-tier commercial option for the current generation.
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.