BorgWarner 58061191364 Stiff BOV Spring for EFR Turbochargers

The BorgWarner 58061191364 is a high-performance replacement spring designed specifically for the internal blow-off valve (BOV) system on EFR series turbochargers. This alternate "stiff" CRV spring provides a 66% stiffer spring rate than the standard EFR spring, offering enhanced valve control for demanding applications.

Key Features:

• Provides the stiffest spring rate suitable for use with the EFR internal BOV
• Compatible with all BorgWarner EFR turbochargers equipped with internal compressor recirculation valve
• Helps prevent BOV flutter during part-throttle cruising in high vacuum conditions
• Recommended for high boost pressure applications
• Genuine BorgWarner OEM replacement component

This spring is not required based on horsepower or boost level alone—most applications work fine with the standard CRV spring. It's specifically designed for applications that experience an open CRV during part-throttle cruising or surge issues when lifting the throttle. This upgraded spring provides additional clamping force to keep the valve sealed under higher vacuum conditions while maintaining optimal performance characteristics.