Designed for the increased duties of aftermarket camshafts and increased rpm operation. We've sourced springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy. Included is a stainless set of retainers to reduce weight. On parts that change direction quickly, this goes a long way! 

Specifications:

Seat Pressure: 86.21lbs
Coil Bind: 0.835"
Seat Requirement: OEM MZR/DURATEC
Net Lift: 0.4807" / 12.21mm