BorgWarner 11587100007 EFR 6258 Turbo Cartridge with Iron Bearing Housing

The BorgWarner 11587100007 is a replacement cartridge (CHRA - Center Housing Rotating Assembly) for the EFR 6258 turbocharger featuring a cast iron bearing housing. This cartridge is designed for the EFR (Engineered For Racing) series, BorgWarner's flagship line of high-performance turbochargers.

Key Features:

• Lightweight Gamma-Ti (titanium-aluminide) turbine wheel and shaft assembly for rapid boost response
• Dual ceramic ball bearing cartridge with metal cage for superior thrust capacity and durability
• Cast iron bearing housing for maximum strength and durability in high-temperature applications
• Supports 225-450 horsepower applications
• 62mm compressor with 49.6mm inducer rated at 44 lb/min maximum airflow
• Direct replacement cartridge for EFR 6258 turbochargers

This cartridge assembly features BorgWarner's patent-pending dual ceramic ball bearing system, which provides approximately 50% less drag than standard ball bearing turbos while delivering exceptional turbine efficiency at low expansion ratios. The iron bearing housing construction offers increased thermal stability and structural integrity compared to aluminum alternatives, making it ideal for extreme performance and endurance applications including road racing, drag racing, rally, and drift competitions.

The EFR 6258 is the smallest and fastest-spooling turbo in BorgWarner's EFR lineup, making this cartridge perfect for applications requiring excellent throttle response and compact fitment.