Efficiency Valve Spring Compressor Tool Key benefits Efficient and fast valve spring work: designed to help you complete valve spring with less effort and in less time. 3/8 inch drive compatibility: built as a valve spring removal tool that fits standard 3/8 drive setups for easy integration with common tools. Clear compatibility: suitable for engines with 3.7L and 4.7L displacement. Please confirm model applicability before . Focused function for easy disassembly: engineered for straightforward valve spring removal and installation. What this tool does It is a dedicated valve spring removal tool that supports efficient disassembly during valve train service. The 3/8' drive design makes it compatible with typical workshop toolsets, enabling smooth operation in routine maintenance and tasks. Compatibility and usage notes Engine compatibility: 3.7L and 4.7L engines. Model applicability: this tool is for specified models. Please confirm that your engine model is supported before . Specifications Drive size: 3/8 inch Type: Valve spring removal tool Applicable engine displacement: 3.7L, 4.7L Use scenarios DIY maintenance on a 3.7L engine: perform valve spring replacement at home or in a hobby workshop with standard 3/8 drive tools. Professional service: support valve train work on 4.7L engines during head or valve maintenance, using the tool to remove springs efficiently. Service center use on multiple engines: suitable for environments where engines with 3.7L or 4.7L displacement are serviced, ensuring quick valve spring removal with common tooling.