Upgrade your valve train with Andrews Valve Spring Upper Collars. These collars offer increased spring travel and enhanced durability compared to stock components, improving overall engine performance. Made in the U.S.A. to ensure quality and reliability. Description These Andrews Valve Spring Upper Collars provide a crucial advantage by offering an additional 0.050" of spring travel, preventing coil bind and allowing for higher lift camshaft profiles. This translates to improved airflow and increased horsepower potential. Engineered to be stronger and lighter than the factory collars, these aftermarket valve spring collars enhance valve train stability at high RPMs, reducing valve float and promoting more consistent performance. Designed for use with stock keepers, simplifying installation and ensuring compatibility with existing hardware. Upgrade to Andrews Valve Spring Collars for improved performance and reliability. Features & highlights Provides an extra 0.050" of valve spring travel, preventing coil bind. Stronger and lighter than stock collars for improved valve train stability. Allows use of higher lift camshafts for increased performance. Designed for use with stock keepers for ease of installation. Made in the U.S.A. for exceptional quality and durability. Technical specifications Brand: Andrews Vendor Part Number: 293115 Application: Exhaust, Intake Product Name: Spring Collar Type: Valve Units: 4 Pack Important to know Stock keepers are required for installation (not included).