Kibblewhite Valve Spring Kit, 0.415-Inch Lift, Lightweight High-Lift Racing for Kawasaki (40-40660)

The Kibblewhite 40-40660 Valve Spring Kit is engineered for Kawasaki racing engines requiring reliable valve control with standard or oversized valves. Designed for high-lift applications up to 0.415 inches, this lightweight racing spring kit supports consistent valvetrain performance under demanding engine speeds and operating conditions.
The kit includes precision-engineered valve springs and titanium upper collars, with lower collars included where required for the application. Components are selected to provide a complete spring setup for one engine, helping simplify installation and ensuring the necessary spring and collar components are matched for performance-oriented builds.
Kibblewhite designs its valve train components for builders who demand dependable fit, controlled spring behavior, and durable operation in competition and high-performance environments. The 40-40660 kit is made in the United States and is intended for use with compatible Kawasaki applications. Verify engine and valve specifications before installation to confirm compatibility.
Keepers are not included and must be supplied separately when required. Professional installation and proper setup checks are recommended, including installed height, spring pressure, coil clearance, retainer fit, and maximum valve lift, to help ensure safe and reliable operation.

Features:

• Application: Designed for compatible Kawasaki racing engines

• Lift Compatibility: Supports valve lift up to 0.415 inches

• Kit Contents: Includes valve springs and titanium upper collars

• Lower Collars: Included as required for the application

• Engine Coverage: Complete spring kit for one engine

• Valve Compatibility: Engineered for standard and oversized valves

• Keepers: Not included

• Manufacturing: Made in the United States

Ships from Parts Unlimited.