Upgrading the B5 S4 turbo inlet For sale on an Audi B5 S4 is a common performance modification, typically involving replacing the stock components with higher-flow aftermarket or RS4-replica pipes. This upgrade can improve airflow, leading to increased power and a more aggressive engine sound.
Aftermarket Options for B5 S4 turbo inlet For sale
- 034Motorsport Inlet Pipe Set
- Designed as a replica of the B5 RS4 inlets, which are larger and intended for the K04 turbos that many S4 owners upgrade to.
- Reviewers mention that the installation can be time-consuming but is “worth it” for the improved sound and feeling of more boost throughout the power band.
- The pipes are test-fitted on a 2.7T motor with genuine BorgWarner RS4 turbos to ensure a proper fit.
- Alpha Competition RS4 K04 Inlet Pipe Kit
- This kit is designed to provide smoother airflow and delivers a noticeable increase in power and response by optimizing the air supply to the engine.
- It is specifically designed for vehicles upgraded to K04 turbos and is considered an essential upgrade for enthusiasts seeking better performance.
- TTE Global High Flow Upgrade Intakes
- These intakes are designed to replace the problematic “lobster claws” of the stock system with a smoother, high-flow design, minimizing welds and transitions.
- The outer tube diameters are 70 / 63.5mm, indicating a significant size increase over stock.
Benefits of Upgrading B5 S4 turbo inlet For sale
- Improved Airflow: Aftermarket B5 S4 turbo inlet For sale are designed to remove restrictions present in the stock intake tract, allowing for a smoother and more efficient path for air to reach the turbochargers.
- Increased Performance: By increasing the amount of cool, dense air entering the engine, these upgrades can boost horsepower and torque, providing more power throughout the power band. A simple chip and exhaust upgrade combined with inlets can see power around 350hp.
- Better Sound: The modification often results in a more pronounced engine sound, including air being pulled in and the turbine spinning.
- Key Considerations
- Turbo Compatibility: Standard B5 S4 turbo inlet For sale models came with K03 turbos. Many aftermarket inlet pipes (like the RS4 K04-specific ones) are designed for the larger K04 turbos and will not fit K03s or other turbochargers without modification. Ensure you select the correct pipes for your specific turbo setup.
- Material: Inlets are typically made from aluminum (providing rigid, high-flow paths) or reinforced silicone (offering flexibility and durability).
- Performance Benefits: Upgraded inlets remove airflow restrictions, ensuring the turbocharger gets a steady and efficient supply of cooler, denser air, which can improve combustion and increase engine performance.
- Installation Tip: According to Sharp Motorsport, it is easier to mount the new inlet pipes to the turbos before mounting the turbos onto the exhaust manifolds
Product Options
- Alpha Competition RS4 K04 Inlet Pipe Kit: This kit is designed to optimize the air supply to the engine and is an essential upgrade for those seeking better performance, according to Alpha Competition. It is specifically designed for use with K04 turbos.
- 034Motorsport SüperDüper Turbo Inlet Pipe: While some 034 products are designed for the B9 S4, they also offer inlets for the B5 generation. Reviewers noted that an intake and turbo inlet mod from 034 Motorsports resulted in an “amazing sound” and “a bit more boost throughout the power band” in a B5 S4, indicating a positive performance impact.
- VAST Aluminum Turbo Inlet Pipe Kits: VAST offers aluminum RS4 K04 turbo inlet pipe kits that are compatible with the B5 S4 and C5 A6 2.7T engines. These are durable aftermarket options.
- THE-RS4 / S4 B5 High Flow Upgrade Intakes: These upgrade intakes are designed with minimal welds.
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