BorgWarner 12701019047 EFR B2 Turbine Housing 70mm 1.05 A/R T4 Twin Scroll

The BorgWarner 12701019047 is a precision-engineered replacement turbine housing designed specifically for the EFR 7670 B2 turbocharger. This high-performance component features a 70mm turbine wheel diameter with a 1.05 A/R (area/radius) ratio, optimized for applications requiring external wastegate control and maximum exhaust flow efficiency.

Key Features:

• Investment cast stainless steel construction for superior heat resistance and durability
• T4 twin scroll flange pattern for divided exhaust manifold applications
• 1.05 A/R ratio provides optimal balance between spool characteristics and top-end flow
• Designed for external wastegate configuration (no internal wastegate provision)
• Thin-wall casting reduces weight and thermal inertia for improved response
• GT V-band turbine outlet connection (3-inch small V-band)
• Smooth internal flow channels for maximum turbine efficiency

This turbine housing allows you to customize your EFR 7670 turbocharger setup by changing the A/R ratio, flange pattern, or wastegate configuration. Compatible with BorgWarner's Gamma-Ti 70mm turbine wheels, it's ideal for high-performance applications ranging from 375-650 horsepower in single turbo setups. The T4 twin scroll design maximizes exhaust pulse separation for improved turbine efficiency and reduced turbo lag.