034Motorsport Catch Can Kit, B9/B9.5 Audi SQ5

The 034Motorsport Catch Can Kit (034-101-1026) is a critical performance and safety upgrade for the B9/B9.5 Audi SQ5 (3.0T EA839). The factory PCV (Positive Crankcase Ventilation) breather hose is notoriously failure-prone; when its plastic check valves fail, boost pressure can enter the crankcase, leading to oil being expelled through the oil cap—a known fire hazard. This kit replaces the flimsy OE hose with a robust, high-flow system featuring proprietary check valves capable of holding 40+ PSI, making it essential for everything from stock daily drivers to Stage 3 high-boost builds.

Beyond safety, this system acts as a sophisticated filtration unit. It utilizes a baffled Billet Aluminum Catch Can to trap oil deposits and vapors before they can enter the intake tract. By intercepting these contaminants, the kit drastically reduces carbon buildup on intake valves and prevents oil from pooling in the intercooler and charge pipes. Unlike other aftermarket solutions that delete the manifold vacuum source, 034Motorsport preserves the dual-vacuum design, ensuring the PCV system functions correctly at idle, cruise, and under full boost.

Key Features:

• Complete PCV Overhaul: Replaces the failure-prone factory breather hose with 22.5mm high-flow silicone and billet check valves.
• High-Boost Reliability: Proprietary check valves feature a nylon ball for strength and a synthetic rubber diaphragm for heat resistance, tested to 40+ PSI.
• Vortex Accumulator Design: Meticulously engineered catch can body traps oil vapors while maintaining unrestricted crankcase ventilation.
• Service-Free Operation: Includes an integrated drain line that automatically returns captured oil to the oil pan, eliminating the need to manually empty the can.
• FluoroLined™ Silicone Hoses: 4-ply reinforced hoses are lined to prevent oil sweating and are molded to retain the factory engine cover fitment.
• Integrated Dipstick: Allows for quick and easy checking of oil levels within the can.
• No-Drill Installation: Includes a custom mounting bracket and heat shield for a clean, bolt-in factory appearance.

Technical Specifications:

Why it Matters: During 034Motorsport's Stage 3 development, an OEM breather hose failure caused an oil fire on their test vehicle. This kit was engineered specifically to prevent that failure mode by replacing plastic parts with billet aluminum and high-temp synthetic rubber.