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7A EFI Injector Adapter Kit

Upgrades the failure-prone factory 7A fuel injectors with modern high impedance Bosch fuel injectors - For B3 Audi 80/90/Coupe Quattro I5 20v engines
7A Inline 5-Cylinder 20V Engine Only
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ECS Part #
Availability: Direct Ship, Ship ETA Dec 17, 2020
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Product Details

7A Inline 5-Cylinder 20V Engine Only

034Motorsport's complete 7A EFI injector adapter kit upgrades the failure-prone factory 7A fuel injectors with modern high impedance Bosch fuel injectors. The Bosch injectors supplied in the kit are an exact match for the stock Hitachi injectors, but offer more consistent flow and superior atomization. Provides improved idle, part-throttle response, fuel economy, and horsepower over stock Hitachi injectors.

We recommend this upgrade not only for maintenance and repair, but also as a performance upgrade with a dyno proven 5 WHP increase throughout the powerband over stock Hitachi injectors. Maintains stock air-fuel ratios at idle and part throttle, and a steady 12.5:1 AFR under wide-open-throttle. These injectors can supply fuel up to approximately 200hp at the crank. Breathe new life into your 7A engine for a fraction of the price of a single stock Hitachi injector!

What's Included:

  • 034Motorsport Billet Aluminum Injector Adapters (Set of 5)
  • Bosch style High-Impedance Fuel Injectors (Set of 5) - (The original Bosch injectors we used have since been discontinued by Bosch, what we supply now are high quality, flow tested replica injectors made by a major injector manufacturer to replace the original Bosch discontinued injector)
  • Necessary O-Ring Seals for Installation
  • Plug-In Resistor Bypass Harness 


  • 1990-1991 Audi 90 20V Quattro (7A Inline 5-Cylinder 20V Engine)
  • 1990-1991 Audi Coupe Quattro (7A Inline 5-Cylinder 20V Engine)

*Please Note:*

*This kit supplies high impedance injectors. The stock resistor pack must be bypassed by rewiring*

*We update the injectors that come with this kit from time to time, so the injectors you receive may not be identical to the ones pictured.  This is done in an effort to always supply the most current, up-to-date product possible.*

This Part Fits the Following Vehicles

Make Model Submodel Engine
Audi 80 Quattro 5 Cylinder
Audi 80 FWD 5cyl
Audi 80 Quattro 5cyl
Audi 90 FWD 20v
Audi 90 Quattro 20v
Audi 90 Quattro 5 Cylinder
Audi Coupe Q All 5cyl
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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