BorgWarner Super Core EFR B1 6258

BorgWarner is well-known for its robust and reliable drivetrain components, and their EFR (Engineered for Racing) line of turbochargers represents a significant step forward in forced induction technology. This EFR B1 6258 Super Core Assembly is a prime example, built for enthusiasts who demand serious performance from their vehicles. It's designed to be the heart of a custom turbo system, offering a solid foundation for building significant horsepower.

The B1 6258 features a forged-milled aluminum compressor wheel, known for its strength and light weight, which helps improve spool-up time. The turbine housing is cast from a high-nickel, ductile iron alloy, giving it excellent resistance to high temperatures and thermal shock—critical for sustained performance under demanding conditions. This core assembly includes the compressor and turbine sections, ready for you to integrate with your chosen intake and exhaust plumbing. It's designed with features like a speed sensor port for advanced data logging and a dual-row, full-width center bearing to handle increased boost pressures and ensure longevity.

When building a custom turbo setup, the super core is arguably the most critical component. This BorgWarner unit is a popular choice because it offers a well-built assembly with advanced features that make it easier to achieve your performance goals. While this assembly is designed for high performance, please note it is not CARB approved and cannot be shipped to California. You will need to source compatible intake piping, exhaust housing, wastegate actuator, and intercooler system to complete your turbocharger setup.