Engine Management and EFI, Dual Plug, 911 (964 / 993)
Ignition, injection and induction for dual-plug air-cooled engines from a long-standing specialist.
Engine Management In production confidence: low
Unconfirmed. This entry rests on a single source that does not
fully document the part. Treat the manufacturing details below as provisional
until confirmed by the manufacturer.
Manufacturing
| Manufacturer | Clewett Engineering |
|---|---|
| Origin | 🇺🇸 United States Manufactured here Clewett Engineering, California. |
| Process | Electronics / Software |
| Additively manufactured | No |
Fitment
| 964 | All models |
|---|---|
| 993 | All models |
Sources
- Porsche 964 & 993 Engine Management & EFI (Dual Plug) — Clewett Engineering, accessed 2026-08-18