The Audi TTRS 8J Fuel Rail 2.5 TFSI is an original gasoline fuel system component designed for 2.5 TFSI engines in sporty Audi models. It ensures stable fuel distribution to the injectors, which is crucial for performance, engine smoothness, and operational safety.
Specifications and technical data
- SKU: 07K133317J
- Mark: Audi
- Condition: Used
- OEM Part Number: 07K133317J
- Substitutable numbers: 07K133317J, 07K 133 317 J
- Fuel type: Petrol
- Part type: Fuel Injector
- Category: Fuel Injectors
Purpose and Function in the Fuel System
The fuel rail in a TFSI gasoline engine is responsible for evenly distributing fuel to individual injectors, maintaining proper pressure, and ensuring the entire fuel supply section is sealed. In 2.5 TFSI units, this directly impacts:
- stable engine operation across the entire RPM range, including during dynamic acceleration,
- precise gasoline dosing, supporting correct combustion and throttle response,
- maintaining factory parameters of the injection system, important for modifications and tuning.
Thanks to its proper design, the rail works with the high-pressure system, maintaining adequate rigidity and resistance to thermal loads typical for turbocharged engines.
Construction and Fitment for Audi TTRS 8J
The Audi TTRS 8J Fuel Rail 2.5 TFSI is designed as an OEM part, meaning it offers a perfect fit with the factory engine hardware. This includes:
- connection geometry matching the original fuel lines and injectors,
- injector port spacing adapted to the 2.5 TFSI engine head,
- mounting points allowing for hassle-free installation in factory brackets.
This type of solution allows for maintaining the factory fuel system configuration, which is particularly important in high-power vehicles where every component affects reliability and performance consistency.
Performance Parameters and Installation Benefits
The rail operates within a system supplied with gasoline, working with injectors designed for high-pressure direct injection. In practice, this means:
- adequate resistance to operating pressure typical for TFSI systems,
- stable injector operating conditions, promoting an even mixture composition in each cylinder,
- reduced risk of power loss resulting from fuel supply issues.
A component from this category is particularly important when operating the car under increased load conditions, such as track driving, dynamic road driving, or after engine software modifications.
Condition, Origin, and Service Application
The offered rail belongs to the group of original Audi parts in the injector nozzle category, making it the correct choice for repairs and rebuilding the fuel system. A used component of this type is a good solution when:
- the factory rail has suffered mechanical damage or external corrosion,
- there are sealing issues at the injector connections or fuel lines,
- the part needs to be replaced with an original one to maintain compliance with service documentation.
By adhering to the manufacturer's specifications, you can expect predictable fuel system behavior after installation, without the need for additional modifications.
Technical Support and Related Materials
If you are looking for other parts in the Audi injector nozzles category, check out the Audi injector nozzles available in our store to find a complete solution for your fuel system.
When diagnosing fuel injection system problems, it is useful to understand common symptoms and checking procedures. An article on our blog may be helpful: diesel injector faults – how to recognize them and what are the consequences of neglecting them, which, although it concerns diesel engines, discusses universal issues related to injector diagnostics and the consequences of neglect.
