BorgWarner 6258 EFR Ball Bearing T4 Turbo (11589880036)

6258 T4 IWG Turbocharger (225-250HP) By Borgwarner

The EFR 6258 is the smallest turbocharger in the ultra-efficient EFR lineup. The 62mm OD compressor has a 49mm inducer at 44lb/min max flow – supporting up to 450hp with very large map width for outstanding power potential even at high boost. The 6258 is the fastest spooling EFR turbo – and fits in a small package. Ideal for small engines in single turbo configuration and stock internal or modified engines.

This is an excellent turbocharger for autocross, rally, drift, road racing and street driven applications. The low inertia 58mm Gamma-Ti turbine wheel is optimally matched for maximum response and fastest spool with the FMW compressor wheel. EFR 6258 uses the smallest-sized EFR compressor housing, fitting in the tightest engine bays particularly twin turbo V6 applications. Ideal for use in single turbo applications for the 225-450hp range, or as twin turbo applications 400-700+hp. Ceramic Ball Bearing only, watercooling recommended (not mandatory).

Features

• Gamma-Ti turbine wheel
• Extended Tip Technology
• Boost Control Solenoid Valve (BCSV)
• Forged Milled Compressor Wheel (FMW)
• Integrated Compressor Recirculation Valve (CRV)
• Dual ceramic ball bearing assembly with metal cage
• Compressor cover with speed sensor mounting provisions

Relevant Part Numbers

• 6258 T25 Turbo
• Super Core part# 11587105002
• BorgWarner EFR Technical Guide

Specifications

• 225-450HP
• B1 Turbo Frame Size
• 49mm Comp. Wheel Inducer Dia.
• 62mm Comp. Wheel O.D.
• 58mm Turbine Wheel O.D.
• Straight Compressor Outlet

What’s in the Box?

• 1 T4 6258 .80A/R Turbocharger

Warranty

• 1-Year Manufacturer’s Warranty