Upgrade your classic air-cooled Porsche with the AT Power Porsche 911 EFI Throttle Installation Kit, a complete bolt-on solution designed to convert your engine to a modern Electronic Fuel Injection (EFI) Individual Throttle Body (ITB) system.
Designed for Porsche 911 models from 1978–1989, this system features AT Power’s patented shaftless butterfly throttle technology, delivering significantly improved airflow, reduced turbulence, and increased volumetric efficiency. The result is sharper throttle response, increased horsepower and torque, improved drivability, and the unmistakable intake sound of individual throttle bodies.
Each kit includes precision-machined aerospace-grade billet aluminium throttle bodies along with all supporting systems required for a complete EFI conversion, including fuelling, vacuum, oil breather, air filtration, and heater components.
For a complete engine management solution, the kit can also be supplied with an optional Emerald K6 ECU package, including ECU, engine harnesses, hardware, software, and a base calibration map.
Designed as a fully reversible bolt-on upgrade, the system allows your vehicle to be returned to its original specification if required. Ideal for performance builds, restomods, and motorsport applications.
Key Features & Benefits:
- 42, 45 and 48mm throttle size for enhanced airflow and response
- Fits Porsche 911 (1979-1989)
- Supports 39-43mm intake port sizes
- Optimised for naturally aspirated flat-six engines
- Ideal for classic restoration, performance road & motorsport use
- Precision engineered for perfect fit and long-term durability
Whether you are restoring a period-correct classic or unlocking additional performance from your air-cooled flat-six, this Porsche 911 throttle body upgrade offers proven performance gains with OEM-level fitment.
Optional Extras:
Fuel System Kit – Hose, Adaptors, Fuel Pressure Regulator & Pico 377cc Injectors
- Complete, matched fuel delivery solution for reliable performance
- High-quality hoses and precision adaptors ensure leak-free installation
- Includes fuel pressure regulator for stable, consistent fuel control
- Pico 377cc injectors deliver accurate atomisation and improved throttle response
- Designed for performance and longevity in high-demand engine applications
Heater Duct System
- Restores proper airflow to engine-mounted heating system
- Improves cabin heat efficiency and demisting performance
- Durable construction resistant to heat and vibration
- Direct-fit solution for clean, OEM-style installation
- Essential for road-driven and cold-weather vehicles
Engine Breather System
- Controls crankcase pressure for improved engine reliability
- Reduces oil misting and prevents intake contamination
- Helps maintain stable idle and consistent performance
- High-quality components designed for performance engines
- Ideal upgrade for both road and motorsport applications
Emerald ECU Kit – Cable Pull or Drive-By-Wire
- Advanced programmable ECU for precise engine management
- Available for traditional cable throttle or modern drive-by-wire setups
- Improves power delivery, throttle response, and drivability
- Supports custom tuning for modified and performance engines
- Proven reliability with extensive motorsport and road use
911 Rain Guard Kit – Critical Engine Protection
- Prevents water ingress into the intake system
- Protects engine from hydro-lock and severe internal damage
- Essential safety upgrade for road-driven vehicles
- Discreet design with OEM-style fitment
- Failure to fit may result in serious engine damage
MegaFlow Air Filter
- High-flow design improves engine breathing and performance
- Superior filtration protects engine from dirt and debris
- Increases airflow without sacrificing filtration efficiency
- Reusable and easy to maintain
- Ideal for performance road and track applications
Make Power Personal – Anodised Finish Colours
If you require something more bespoke, please contact us.
Complete the setup – AirFlow Synchrometer here.
Important:
- ECU Compatibility and Tuning Required: Proper engine management system tuning is necessary for optimal operation and fuelling.
- Maps are supplied “as-is”. Professional dyno tuning is strongly recommended to ensure optimal performance and avoid potential engine damage.
If you require something more bespoke, please contact us.
Motorsport Use Only! This product is designed for professional motorsport applications and must be installed by a qualified technician. If assistance is required, please contact AT Power’s sales team.
