Upgrade your Golf 4 GTI or other VAG 1.8T 20VT engine with these Bosch 550cc injectors, ideal for projects ranging from 240 to 330+ pk. These injectors come with connector adaptors and fit perfectly without the need to raise or modify the fuel rail. Designed for even fuel distribution and high reliability, even when using E85 fuel.
Unlike many universal injectors, these Bosch injectors offer a 100% OEM fit guarantee. No shims, no modifications – simply plug-and-play installation with factory-quality fit and excellent flow consistency.
Advantages
-
Fit guarantee:
fits perfectly on the 1.8T / 20VT without modification
-
High flow capacity
of up to 550 cc/min at 3 bar
-
E85-compatible
, suitable for alternative fuels
-
Double conical spray pattern
for optimum atomisation
-
USCAR connector
including adapter set
-
Reliable Bosch quality
, OEM manufacturing
Technical specifications
-
Flow: 547cc/min = 374g/min = 50lb/hr @ 3 bar
-
Flow: 632 cc/min = 432 g/min = 57 lb/hr @ 4 bar
-
Spray pattern: Double cone
-
Body: Standard length
-
Nozzle: Standard tip
-
Resistance: 12 ohms
-
Connector: USCAR (including adaptors)
-
Fuel compatibility: Petrol / E85
Compatibility
-
Engines:
1.8T / 20VT (all variants with common rail injection)
-
Vehicles:
Golf 4 GTI, Audi TT 8N, Audi A3 8L, SEAT Leon 1M, Škoda Octavia 1.8T and similar VAG platforms.
Choice of engine codes:
-
AGU / AEB:
suitable for early 1.8T models with a wide-port cylinder head.
-
Other:
for the following engine codes: AJQ, APP, APX, AMK, BAM, ARZ, AUM, AUQ, AJL, ANB, APU, ARK, AWU, AWW, AWV, AWX, AWD, BEK, BFV, BBU, BEX, BJX, AWM, AMB, ATW, AUG, AWT, BVP, BYP, BGB, BFB, BVC.
Important note
Please note: it is essential to have the engine software adjusted by a tuner to prevent engine damage.
Contents
- 4x Bosch 550cc injectors (@3 bar)
- 4x Connector adaptors (USCAR to OEM)
- Installation instructions
Frequently asked questions
Does the ECU need to be reprogrammed during installation?
Yes, software adjustment by a tuner is mandatory to maintain the correct AFR (air-fuel ratio) and prevent engine damage.
Are these injectors suitable for E85?
Yes, these Bosch injectors are fully E85-compatible and ethanol-resistant.
Will these fit without any modifications to the fuel rail?
Yes, the length and fit are identical to OEM. No spacers or shims are required.
What is the difference between AGU/AEB and ‘Other’?
The AGU/AEB injectors are specifically for the early wide-port engines, whilst ‘Other’ covers all later 1.8T 20VT variants, including BAM, AMK, AUM and AUQ.
