Kibblewhite Valve Spring Kit for 0.440-Inch Lift Honda Engines (30-30640)

The Kibblewhite 30-30640 Valve Spring Kit is designed for Honda performance and racing applications requiring reliable valve-train control at up to 0.440-inch lift. This complete kit includes matched valve springs and titanium upper collars engineered to support consistent operation with standard and oversized valves. It is a practical upgrade for builders seeking lightweight, durable components for high-performance engine configurations.
The spring kit is supplied complete for one engine and includes lower collars where required by the application. Kibblewhite engineers its spring kits for dependable fitment and performance with compatible Honda cylinder head components. The lightweight racing design helps reduce valve-train mass while maintaining the spring control needed for demanding operating conditions.
Keepers are not included, so verify the required keeper style and compatibility before installation. Proper setup should include checking installed height, spring pressure, coil bind clearance, retainer-to-seal clearance, and valve-train geometry according to the engine builder’s specifications. Made in the U.S.A., the Kibblewhite 30-30640 provides a focused valve-spring solution for Honda engines using standard or oversized valves.

Features:

• Application: Designed for compatible Honda performance and racing engines

• Lift Rating: Supports valve lifts up to 0.440 inch

• Kit Contents: Includes valve springs and titanium upper collars

• Lower Collars: Included where required by the application

• Engine Coverage: Complete spring kit for one engine

• Valve Compatibility: Engineered for standard and oversized valves

• Keepers: Not included; verify compatibility before installation

• Manufacturing: Made in the U.S.A.

Ships from Parts Unlimited.