TGK Motorsport Audi B10 PCV Air Oil Separator Conversion Adapter Plate
TGK Motorsport Audi B10 PCV Air Oil Separator Conversion Adapter Plate
Regular price
$149.99
Sale price
$149.99
Regular price
Unit price
per
Shipping calculated at checkout.
Couldn't load pickup availability
- Fully secure checkout
- Trusted by thousands
- Rated and reviewed
PREORDER
PREORDER ETA: Early - Middle of November
This Product is currently available as a preorder!
Orders placed will hold spot in queue!
Documentation
Question about this product?
We're happy to help.
Pre-order
Overview
The factory PCV system on 2017–2025 Audi B9 platform vehicles running the EA839 3.0T and 2.9T engines is a known weak point at elevated power levels. Oil vapor is returned directly into the intake tract, coating intercooler cores, throttle bodies, and intake ports with an oily film that reduces combustion efficiency, invites detonation under boost, and accelerates carbon buildup on direct-injection intake valves — a problem that compounds every time you push the EA839 hard on track or on the street. The stock PCV architecture was simply not engineered with upgraded power output or sustained high-load driving in mind.
The TGK Motorsport B9 EA839 PCV Air Oil Separator Adapter Plate solves this problem cleanly and permanently. Precision-machined from aerospace-grade 6061 billet aluminum, this adapter plate bridges the gap between the upgraded EA839 EVO B10 Air Oil Separator and your B9 EA839 motor — letting you run a proven, high-capacity AOS on a platform it was never originally designed for. No fabrication, no hacks, no compromises. Just clean, oil-free air entering your intake system and a longer-lived, healthier EA839.
Specifications
| Part number | TGK-0311-05 |
| Compatible vehicles | 2017–2025 Audi A4, A5, A6, A7, S4, S5, S6, S7, SQ5 — B9 Platform | EA839 3.0T & 2.9T engines |
| Material | 6061 Billet Aluminum — CNC machined |
| Hardware included | Yes |
| Warranty | Lifetime structural warranty |
Features & Benefits
✓
B10 AOS CompatibilityAllows direct fitment of the superior EA839 EVO B10 Air Oil Separator onto 2017–2025 B9 EA839 3.0T and 2.9T motors — an upgrade path that previously did not exist without custom fabrication.
✓
6061 Billet PrecisionCNC-machined from 6061 aerospace-grade billet aluminum for dimensional accuracy that guarantees a leak-free, rattle-free seal every time — no porosity, no warping, no flex under heat cycles.
✓
Cleaner Intake ChargeBy enabling a high-efficiency AOS on your B9 EA839, oil vapor is captured before it can contaminate the intercooler, throttle body, and intake ports — protecting power output and combustion consistency under boost.
✓
Hardware IncludedEvery fastener and piece of hardware required for installation is included in the kit — no hardware store runs, no guessing on thread pitch or torque spec.
✓
Direct Bolt-On FitEngineered specifically for the B9 EA839 3.0T and 2.9T motor architecture — drops into place with no cutting, no welding, and no permanent modification to your vehicle.
✓
Lifetime Structural WarrantyBacked by TGK Motorsport's lifetime structural warranty — built to outlast your build, whether you're daily driving a tuned S4 B9 or pushing an SQ5 on track.
Frequently Asked Questions
What does this adapter plate actually do?
This CNC-machined 6061 billet aluminum adapter plate acts as an interface between the EA839 EVO B10 Air Oil Separator and the B9 EA839 engine found in 2017–2025 Audi S4, S5, A6, A7, SQ5, and related B9 platform vehicles with the 3.0T or 2.9T engine. The B10 AOS is a more capable separator unit, but its mounting points do not natively match the B9 motor. This adapter plate corrects that mismatch, making the upgrade a clean bolt-on installation.
Does this kit include the Air Oil Separator itself?
No — this product is the adapter plate only. It is designed to work with the EA839 EVO B10 Air Oil Separator, which must be sourced separately. The adapter plate provides the mounting solution that makes the B10 AOS compatible with your B9 EA839 3.0T or 2.9T motor.
Which Audi B9 vehicles and engines are compatible?
This adapter plate is designed for 2017–2025 Audi B9 platform vehicles equipped with the EA839 3.0T or 2.9T engine. This includes the Audi S4 B9, S5 B9, A6, A7, S6, S7, and SQ5 among others. If your vehicle runs an EA839-family engine on the B9 platform, this adapter is engineered for your application.
Is professional installation required?
The adapter plate is a direct bolt-on component and does not require cutting, welding, or permanent modification. That said, PCV system work on the EA839 does involve working around engine accessories and vacuum lines. Enthusiasts with solid mechanical experience and proper tools can complete the install at home, but if you are unfamiliar with the EA839's engine bay, a qualified Audi specialist will ensure correct torque values and fitment.
Why upgrade the PCV system on a B9 EA839 at all?
The stock PCV system on the B9 EA839 3.0T and 2.9T recirculates oil vapor back into the intake charge. At stock power levels this is manageable, but on tuned or high-output builds it means oil contamination across the intercooler core, throttle body, and intake ports — reducing power, promoting carbon buildup on intake valves, and increasing the risk of detonation under boost. Upgrading to a high-capacity Air Oil Separator with this adapter plate keeps oil out of the intake tract entirely, protecting your engine and preserving consistent performance.
