Kiggly Racing 4g63 Race Only Beehive Valve Springs

Extremely High Seat Pressure, 135lb-150lb. 4g63. Not Recommended for Use in Street Cars.   Fits all 4G63 engines including DSM and EVO •Compatible with all popular cam profiles •Recommended for applications running 50psi or more boost •48 piece Kit Includes: Chromoly Steel Retainers, PAC Racing Springs and Treated Steel Seats •100% Made in the USA •Seat pressure = 131lbs at 1.530“ •Rate = 310lb/in •Max recommended lift = 0.500" •Min recommended spring height at full lift = 1.000“ •Not for use in street cars due to stress and wear induced to other valvetrain components   Kiggly Racing LLC Race Only Beehive Valve Spring Set for high rpm and high boost 4G63 applications requiring extremely high seat pressure. This kit is made in the USA and includes an aggressive PAC Racing beehive spring, FEA-optimized proprietary hardened chrome moly retainers and treated steel seats. This is a drop-in fit with all standard 4g63 components including keepers and seals.    These springs are for serious bu