VAC BMW S63/N63 High Performance Valve Spring Kit with Titanium Retainers

• High Performance Valve Springs 

• Titanium Retainers

• Adds a margin of safety against over-revving or a possible mis-downshift

• Designed for maximum reliability

• Capable of handling both mild and aggressive camshafts

• Compatible with all performance camshafts

• Shot-peened for stress relief

• All made in USA

Seat Pressure: 83 @ 35.7mm

Open Pressure: 165 @ 10mm

Max Lift: 11.2mm

Coil Bind: 23.00mm

Outer Spring ID: 17.20mm

Retainer: Titanium

Rate: 8.2

Inner Spring ID: 14.20mm

Inner Spring OD: 21.00mm

Outer Spring OD: 24.00mm