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: 2-Door Coupe (hatchback), Convertible (1987+)
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | cargo area |
|---|---|
| Outer bounding box | Dual-sub box (10" or 12", same footprint for both): 41"L x 16.75"H, tapered depth 15.5" (top) / 10.25" (bottom). Triple-10" alternative: 32.25"W x 18.5"D x 13.25"H. |
| Known obstructions | None specifically documented |
| Usable volume estimate | 2.54 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" sealed, single chamber |
|---|---|
| Box type | sealed |
| Location | cargo area |
| Subwoofers | 2x12" (dual box, 2.54 ft3 total) or 3x10" (triple box, real named alternative) |
|---|---|
| Box type | sealed or ported |
| Location | cargo area |
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 | Real, but genuinely SYSTEM-DEPENDENT, not one fixed answer — see factory_amp_premium_audio. Base (non-Bose) system: dash-mounted, not doors (see other_speaker_locations). Delco/Bose-equipped cars (higher trims, late 1980s+): front speakers relocate to the KICK PANELS instead of either doors or dash — a real, different architecture from the base car, not a size variant. |
|---|---|
| Known obstructions | Whether a given car's front stage is in the dash or the kick panels depends entirely on whether it has the Bose system — check before assuming either. |
| Adapter bracket needed | unconfirmed |
| Factory speaker size | n/a — 2-door body styles only |
|---|---|
| Known obstructions | No rear doors on this platform |
| Adapter bracket needed | n/a |
| Factory amp / premium audio | Real, confirmed, genuinely different system architecture from a typical speaker-count upgrade — worth reading carefully before assuming a simple aftermarket swap. Delco/Bose became orderable on higher trims starting LATE in this generation's run (1990-1992 sourcing is the most specific; the IROC-Z package itself arrived 1985, but Bose specifically is documented for the later years, not confirmed from 1982 or even 1985 start). GENUINE INTEGRATION HAZARD: the Bose amplifier is INTEGRATED INTO THE SPEAKER ENCLOSURES THEMSELVES, not a separate standalone amp box — meaning you cannot simply unplug an external amp and rewire around it the way you can on most amplified systems; the amp and speaker are one physical unit. A further real, specific hazard: the factory head unit on Bose-equipped cars does NOT have standard speaker-level leads at its harness connector — a straight universal wiring-harness swap will not work the way it does on a non-Bose car. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward on base (non-Bose) cars. On Bose-equipped cars, the missing speaker-level leads at the head unit connector mean sub integration needs a Bose-specific approach, not a generic LOC tap. |
| Head unit | No replacement needed |
Real, multiple named commercial products with full specs — this generation's cargo area is unusually well documented compared to most classic-era entries.
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.