MKIV Supra JZA80 Firewall Plate - 61 Pin MILSPEC Autosports Connector
A clean, purpose-built firewall plate for the MK4 Supra (JZA80), designed to accept a 61-pin Autosport/Milspec circular bulkhead connector. Mounts directly to the Supra firewall to give your standalone harness build a proper mil-spec pass-through — no slotted holes, no grommet hacks, no chafing risks.
The 61-pin bulkhead standard gives you a single disconnect point between the engine harness and cabin harness, making engine pulls and ECU swaps dramatically cleaner. Used internally on every SVK Works mil-spec MK4 Supra harness build.
- Designed specifically for the MK4 Supra (JZA80) firewall
- Accepts the 61-pin Autosport/Milspec circular bulkhead connector
- Single-point engine-to-cabin disconnect — cleaner engine pulls
- Eliminates bare firewall holes, grommets, and wire chafe points
- Used on every SVK Works mil-spec MK4 Supra harness build
- 1-year warranty on workmanship
Specifications
| Fitment | MK4 Supra (JZA80) |
|---|---|
| Application | Firewall bulkhead pass-through |
| Connector | 61-pin Autosport/Milspec circular bulkhead |
| What's Included | Firewall plate only (connector sold separately) |
| Warranty | 1-year workmanship warranty |
Need the 61-pin connector too? Contact us for connector availability, or see our Mil-Spec Autosport Connector listing.
Frequently Asked Questions
What connector does this firewall plate fit?
This plate is designed specifically for the 61-pin Autosport/Milspec circular bulkhead connector, the standard used in mil-spec and motorsport harness builds.
Is the 61-pin connector included?
The plate is sold separately from the connector. The 61-pin Autosport/Milspec connector is available — contact us for current pricing and availability.
Why use a bulkhead connector instead of routing wires directly through the firewall?
A bulkhead connector gives you a single clean disconnect point between the engine harness and cabin harness. Engine pulls become far simpler, chafing through bare firewall holes is eliminated, and the result looks professional rather than cobbled together. It's the standard on every SVK Works mil-spec build.
Does this require cutting the firewall?
Yes — the plate mounts over an opening in the firewall sized for the 61-pin bulkhead connector. Contact us if you need guidance on placement and sizing for your specific build.