TiAL 004039 QR Recirculating Blow Off Valve V-Band BOV - 50mm

The TiAL QR Blow Off Valve is the compact recirculating version of the legendary TiAL Q BOV, engineered for turbocharged and supercharged applications that require recirculated airflow back into the intake system. Built on the same proven 50mm platform as the Q, the QR delivers race-proven performance in a more packaging-friendly design.

Key Features:

• Large 1.98 in (50.5mm) valve for exceptional flow capacity on high-boost applications
• CNC-machined 6061 aluminum alloy body and all internal components for lightweight durability
• Multiple recirculation port options — available in 1.00" (25.4mm), 1.14" (29mm) GTR, 1.34" (34mm) DSM/EVO/Subaru, and 1.50" (38.1mm) sizes to integrate with OEM and custom intake systems
• Convertible design — can be converted into a standard Q BOV (vent-to-atmosphere) by simply swapping the bottom piece
• Standard TiAL V-band flange — outline interchangeable with the Q and original BV50, bolts to any standard TiAL flange without welding
• Viton O-ring valve seal clamped in place to prevent sticking to the seat or pulling out
• Teflon-lubricated, hard anodize-coated valve stem and guide for long-term wear resistance
• High-temp silicone Nomex-reinforced diaphragm actuator for extended service life
• Banjo-type machined aluminum air fitting with oversized 10mm hose barb for quick actuator response
• CNC machined aluminum V-band clamp with stainless steel hardware for a clean, corrosion-free installation
• Available in color anodized finishes: Silver, Red, Blue, Purple, and Black
• Springs available for a range of idle vacuum levels and supercharged applications

What's Included:

• (1) QR BOV Assembly with recirculation return fitting
• (1) TiAL V-Band Clamp
• (1) V-Band Weld Flange (cut for 2.5" pipe — available in aluminum, mild steel, or stainless steel)
• (1) TiAL Machined Aluminum Air Fitting
• (1) High Pressure O-Ring

The TiAL QR is the ideal solution for street and track builds where emissions compliance or intake noise regulations require recirculated boost pressure. Its modular construction and broad port size compatibility make it one of the most versatile recirculating BOVs available.