TGK Motorsport Audi 2.9T Air Intake System - B9 RS4/RS5
TGK Motorsport Audi 2.9T Air Intake System - B9 RS4/RS5
Regular price
$699.99
Sale price
$699.99
Regular price
Unit price
per
Shipping calculated at checkout.
Couldn't load pickup availability
- Fully secure checkout
- Trusted by thousands
- Rated and reviewed
Complete your build
Documentation
Question about this product?
We're happy to help.
NewPre-order
Overview
The factory air intake on the 2019–2026 Audi RS4 and RS5 B9 2.9T biturbo is a textbook case of cost-driven engineering. Audi's OEM plastic airbox and restrictive turbo inlet diameter choke airflow well before your turbos ever reach their potential — a hard ceiling on power, throttle response, and turbo spool that becomes even more punishing once tuning, hybrid turbos, or supporting modifications enter the picture. The inlet diameter is undersized for the flow demands of the EA839 2.9T, and the soft rubber couplers and thin-walled plastic construction add heat soak and unwanted compliance under boost.
The TGK Motorsport Audi RS4 / RS5 B9 2.9T Air Intake System eliminates every one of those restrictions. Built around a true 5" inlet snout and matched 5" high-flow air filter, the system feeds each turbo with a dramatically larger, more direct path from filter to compressor wheel. CFD-validated flow geometry, 6061-T6 machined turbo flanges, and a cast aluminum inlet section replace every piece of OEM plastic — delivering measurable improvements in airflow volume, inlet temperature, and compressor efficiency whether you're running stock turbos or a full hybrid setup.
Specifications
| Part number | TGK-0301-09 |
| Compatible vehicles | 2019–2026 Audi RS4 B9 2.9T / 2019–2026 Audi RS5 B9 2.9T (EA839 engine) |
| Material | 6061-T6 machined aluminum turbo flanges; cast aluminum inlet section |
| Inlet diameter | True 5" inlet snout |
| Filter diameter | 5" high-flow air filter |
| Turbo compatibility | Stock turbos and all hybrid turbo setups |
| Hardware included | Yes |
| Warranty | Lifetime structural warranty |
Features & Benefits
✓
True 5" Inlet SnoutA genuine 5" inlet diameter — not nominal, not approximate — delivers the cross-sectional area the 2.9T biturbo's EA839 compressors demand at elevated flow rates, eliminating the velocity stack effect caused by the OEM undersized inlet.
✓
6061-T6 Machined FlangesTurbo flanges are CNC-machined from 6061-T6 billet aluminum to exacting tolerances, ensuring airtight compressor inlet sealing, zero flex under boost pressure, and a precision interface that soft OEM rubber simply cannot replicate.
✓
Cast Aluminum InletThe cast aluminum inlet section provides structural rigidity and thermal stability in the tight B9 engine bay, resisting heat soak and deformation under sustained high-load driving — keeping intake air temperatures consistent lap after lap.
✓
5" High-Flow FilterThe oversized 5" air filter matches the inlet snout diameter so filtration never becomes the restriction — maximizing dust capacity and service intervals while maintaining the unrestricted flow your turbos need to perform at peak efficiency.
✓
CFD-Validated Flow PathEvery internal radius, transition, and taper in this intake was developed and refined using computational fluid dynamics analysis — ensuring that airflow enters each turbo with minimal turbulence, pressure drop, and velocity loss across the entire RPM range.
✓
Stock & Hybrid CompatibleThe system is engineered to work seamlessly with factory RS4 and RS5 turbos as well as all current hybrid turbo configurations — making it the last intake you'll need to buy as your build evolves, with no adapter plates or revised fitment required.
Frequently Asked Questions
Will this intake work with my hybrid turbos on my B9 RS4 or RS5?
Yes. The TGK Motorsport 2.9T intake is designed to be compatible with all stock turbo configurations as well as the full range of hybrid turbo setups currently available for the B9 RS4 and RS5. The 5" inlet diameter and machined turbo flanges provide the clearance and sealing surface required for larger hybrid compressor inlets without any modification or adapter hardware.
Do I need a tune after installing this intake on my 2.9T Audi?
A tune is not required for the intake to function, but we strongly recommend pairing any significant intake upgrade with a proper ECU calibration to take full advantage of the increased airflow. Your existing tune will still run safely, but a recalibrated map optimized for the new intake airflow data will maximize the power and response gains available.
How does the 5" inlet diameter compare to other intakes on the market for the B9 RS4 / RS5?
Most competing intakes for the B9 2.9T use nominal or tapered inlet diameters that measure smaller at the critical compressor flange interface. The TGK system delivers a true 5" inner diameter at the snout, providing a larger effective flow area than intakes advertised at similar sizing by other brands.
What is included with the TGK Motorsport B9 RS4 / RS5 intake kit?
The kit ships complete with the cast aluminum inlet section, both 6061-T6 machined turbo flanges, a 5" high-flow air filter, and all required hardware for installation. No additional purchases are needed to complete the installation on a stock or hybrid-turbo B9 RS4 or RS5.
What does the lifetime structural warranty cover?
TGK Motorsport's lifetime structural warranty covers the cast aluminum inlet section and machined turbo flanges against defects in materials and workmanship for the life of the part. This covers cracking, porosity failures, and machining defects — giving RS4 and RS5 owners long-term confidence in a component that lives in a high-heat, high-vibration environment.
