BorgWarner EFR B1 Turbine Housing - 63mm .85 A/R V-Band Inlet

Upgrade or rebuild your EFR turbo with the BorgWarner EFR B1 Turbine Housing. Featuring a 63mm turbine wheel inlet, .85 A/R ratio, and V-band inlet design, this turbine housing is engineered for high-performance applications supporting 450-650 HP. Non-wastegate design for use with external wastegate setups. Genuine BorgWarner quality and precision.

Key Features:

• 63mm turbine wheel inlet for optimal flow
• .85 A/R ratio for balanced spool and top-end power
• VOF (Vortex Optimized Flow) design for improved efficiency
• V-band inlet for secure, leak-free connection
• Non-wastegate design for external wastegate applications
• T4 flange compatible for universal fitment
• Genuine BorgWarner EFR quality and engineering
• Supports 450-650 HP applications

Performance Benefits:

• Optimal Flow: 63mm inlet supports high airflow for maximum power
• Balanced Performance: .85 A/R provides excellent spool with strong top-end
• Improved Efficiency: VOF design optimizes exhaust flow for better performance
• Secure Connection: V-band inlet ensures leak-free, reliable sealing
• External Wastegate Ready: Non-WG design for custom wastegate setups
• Universal Fitment: T4 flange works with most turbo manifolds

Specifications:

• Brand: BorgWarner
• Part Number: 11631008003
• Product: EFR B1 Turbine Housing
• Turbine Inlet: 63mm
• A/R Ratio: .85
• Design: VOF (Vortex Optimized Flow)
• Inlet Type: V-band
• Wastegate: Non-wastegate (external wastegate required)
• Flange: T4 compatible
• Power Support: 450-650 HP (application dependent)
• Weight: 5.8 lbs

Fitment Information:

• Compatible With: BorgWarner EFR B1 turbochargers
• Applications: Universal - works with any EFR B1 turbo setup
• Wastegate: Requires external wastegate (not included)
• Note: Verify your turbo uses B1 frame before ordering.

What's Included:

• BorgWarner EFR B1 turbine housing (63mm, .85 A/R)
• V-band clamp (if applicable)

Installation Notes:

• Professional installation strongly recommended
• Requires EFR B1 center section (CHRA)
• Requires external wastegate and wastegate manifold
• Use new gaskets and hardware during installation
• Follow proper turbo installation procedures
• Prime turbo with oil before first start

63mm Turbine Inlet:

The 63mm turbine wheel inlet is designed to support high airflow for applications targeting 450-650 HP. The larger inlet allows the turbine to flow more exhaust gas, supporting higher power levels while maintaining good efficiency. This size is ideal for high-performance street cars and track applications.

.85 A/R Ratio:

The .85 A/R (Area/Radius) ratio provides an excellent balance between turbo spool and top-end power. This ratio offers quicker spool than larger A/R housings while still supporting strong top-end power. It's ideal for applications that need responsive boost delivery without sacrificing peak power.

VOF (Vortex Optimized Flow) Design:

BorgWarner's VOF design optimizes exhaust flow through the turbine housing, improving efficiency and reducing turbulence. This advanced design delivers better turbo response, improved power delivery, and reduced backpressure compared to conventional turbine housing designs.

V-Band Inlet:

The V-band inlet provides a secure, leak-free connection between the turbine housing and exhaust manifold or downpipe. V-band connections are superior to traditional flanges because they distribute clamping force evenly around the entire circumference, preventing exhaust leaks even under high boost and extreme temperatures.

Non-Wastegate Design:

This turbine housing does NOT include an integrated wastegate, making it ideal for custom turbo setups using external wastegates. External wastegates provide superior boost control and are essential for high-performance applications. You'll need a wastegate manifold and external wastegate to complete your turbo system.

T4 Flange Compatible:

The turbine housing uses a T4 flange pattern, which is one of the most common turbo flange sizes. This provides universal fitment with most aftermarket turbo manifolds and makes it easy to integrate into custom turbo setups.

Why BorgWarner EFR?

BorgWarner's EFR (Engineered For Racing) series represents the pinnacle of turbocharger technology. Developed using advanced engineering and extensive testing, EFR turbos deliver exceptional performance, efficiency, and reliability. The EFR series is trusted by professional race teams and serious enthusiasts worldwide.

A/R Ratio Selection Guide:

• .85 A/R: Balanced spool and top-end, ideal for street/track applications
• Smaller A/R (.64-.75): Faster spool, less top-end power
• Larger A/R (.92-1.05): Slower spool, more top-end power

Power Support Guide:

The 63mm .85 A/R turbine housing can support approximately:

• 4-Cylinder: 450-550 HP
• 6-Cylinder: 550-650 HP
• Note: Actual power support depends on engine displacement, boost level, and efficiency

Perfect Pairing:

For a complete EFR turbo system, pair this turbine housing with:

• BorgWarner EFR B1 CHRA (center section)
• BorgWarner EFR compressor housing
• External wastegate (TiAL, Turbosmart, etc.)
• Wastegate manifold for your application
• V-band downpipe for turbine outlet

Installation Tips:

• Use new gaskets and V-band clamps during installation
• Ensure proper oil and coolant line routing
• Install external wastegate with proper spring pressure
• Prime turbo with oil before first start
• Check for exhaust leaks after installation
• Follow proper break-in procedures

Perfect For:

• EFR B1 turbo rebuilds and upgrades
• Custom turbo builds requiring external wastegate
• High-performance applications targeting 450-650 HP
• Track cars and race applications
• Anyone needing .85 A/R turbine housing for EFR B1

Perfect For: High-performance builds requiring a 63mm .85 A/R turbine housing with external wastegate capability and genuine BorgWarner EFR quality.

Pro Tip: Choose your A/R ratio based on your power goals and desired spool characteristics - .85 A/R is ideal for balanced street/track performance.

BorgWarner Quality: EFR series - engineered for racing with advanced VOF technology and proven reliability.

Upgrade your EFR turbo with BorgWarner B1 turbine housing - 63mm, .85 A/R, VOF design, V-band inlet, supports 450-650HP.