TGK Motorsport PCV Breather Line Kit - Audi EA839
EA839 2.9T / Billet Aluminum
$349.99
Sale price
$349.99
Regular price
Skip to product information
TGK Motorsport PCV Breather Line Kit - Audi EA839
$349.99
Sale price
$349.99
Regular price
Overview
The factory PCV breather hose on the EA839 engine is one of the most common failure points under heat and boost. Plastic quick-connect fittings, thin hose construction, and fragile internal check valves make it poorly suited for turbocharged crankcase pressures—especially on tuned or aggressively driven cars. The TGK Motorsport Billet PCV Breather Hose Assembly replaces every weak point in the OEM design with materials and valve architecture intended for long-term reliability in high-temperature, high-boost environments.
Rather than reworking the factory concept, this assembly was designed from the ground up with a focus on valve control, material stability, and long-term service life. Every component was selected to solve a specific failure mode found in the OEM system. This is not a short-term fix or cosmetic upgrade—the TGK Motorsport Billet PCV Breather Hose Assembly is engineered to support everything from stock daily drivers to high-boost, tuned EA839 applications without degradation over time.
Specifications
| Engine Compatibility | EA839 2.9T / 3.0T |
| Construction | CNC-Machined 6061-T6 Aluminum Fittings |
| Check Valve Design | Precision Piston-Style |
| Hose Material | FKM-Lined Multi-Ply Silicone |
| Pressure Rating | 40+ PSI |
| Installation | Direct OE Replacement |
Variant Comparison
| 2.9T Kit | 3.0T Kit | |
|---|---|---|
| Part Number | TGK-PCV-01 | TGK-PCV-02 |
| Engine Code | EA839 2.9T | EA839 3.0T |
| Check Valve Design | Precision Piston-Style | Precision Piston-Style |
| Fitting Material | 6061-T6 Aluminum | 6061-T6 Aluminum |
Features & Benefits
✓
Precision Piston-Style Check ValvesMachined piston design provides immediate sealing under boost with consistent operation regardless of heat or oil vapor exposure, pressure-tested beyond 40+ PSI.
✓
CNC-Machined 6061-T6 Aluminum FittingsBillet aluminum construction eliminates plastic cracking, heat fatigue, and deformation while maintaining precise sealing surfaces for long-term leak prevention.
✓
FKM-Lined Multi-Ply Silicone HoseReinforced silicone with inner FKM fluoroelastomer liner prevents oil vapor saturation and external weeping, keeping the hose structurally stable over time.
✓
OE-Correct Routing and FitmentDirect integration with factory air-oil separator and engine cover while retaining both OEM vacuum reference points without adapters or compromises.
✓
Intelligent Boost ResponseAt idle and light load, vapors flow through post-throttle vacuum; under boost, piston valve seals and redirects to turbo inlet vacuum source.
✓
Long-Term Reliability DesignPermanent solution engineered for stock daily drivers to high-boost tuned applications without degradation—not another consumable plastic failure point.
Frequently Asked Questions
Why does the factory PCV hose fail?
Audi's OE breather hose relies on plastic connectors and diaphragm-style check valves that degrade from repeated heat cycling. As these valves weaken, they can leak or fail entirely, allowing boost pressure to enter the crankcase and forcing oil out of seals.
How do the piston-style check valves work differently?
The piston design provides immediate sealing under boost with higher effective flow area and consistent operation regardless of heat or oil vapor exposure, unlike flexible diaphragms that degrade over time.
Does this require any modifications to install?
No, the assembly integrates directly with the factory air-oil separator and engine cover while retaining both OEM vacuum reference points. No rerouting, adapters, or compromises to crankcase system logic are required.
Can this handle high-boost tuned applications?
Yes, each valve is pressure-tested beyond 40+ PSI and the entire assembly is engineered to support everything from stock daily drivers to high-boost, tuned EA839 applications without degradation.
What's the difference between the 2.9T and 3.0T kits?
Both kits use identical piston-style check valves and billet aluminum construction, with specific fitment differences for each EA839 engine variant to ensure proper OE integration.