BorgWarner 11581009006 EFR Turbine Housing 58mm 0.64 A/R T25 Single Scroll Wastegate

The BorgWarner 11581009006 is a high-performance turbine housing designed specifically for EFR 6258 and 6758 turbochargers. This precision-engineered component features investment cast stainless steel construction for superior durability and optimal exhaust flow characteristics.

Key Specifications:

• Frame Size: B1
• A/R Ratio: 0.64
• Turbine Wheel Size: 58mm
• Inlet Flange: T25
• Configuration: Single scroll
• Integrated wastegate assembly included
• Stainless steel investment cast construction

Performance Benefits:

• Thin-wall construction reduces weight and thermal inertia for faster response
• Smooth internal flow channels maximize turbine efficiency
• Large wastegate port handles high-performance flow requirements
• V-band turbine outlet connection allows flexible turbo clocking
• Compatible with EFR turbochargers rated 225-450 horsepower

This genuine BorgWarner turbine housing allows EFR turbocharger owners to optimize their setup by selecting the ideal A/R ratio for their specific application. The 0.64 A/R ratio provides an excellent balance of spool characteristics and top-end flow, making it ideal for single turbo applications on small to medium displacement engines, as well as twin turbo setups on larger engines.

Note: This is a turbine housing assembly only. Complete turbocharger center section (CHRA) sold separately. Turbine outlet V-band clamp, inlet gasket, and hardware sold separately.