Upgrade your oil pump system with the Peterson Fluid Systems Stack Adapter, designed for seamless integration and optimal performance. Precision Fit: With a diameter of 3.500 inches, this stack adapter ensures a tight and secure connection, minimizing leaks and maximizing efficiency. Durable Construction: Crafted from high-quality materials, this component is built to withstand the rigors of high-performance applications, ensuring long-lasting reliability. Easy Installation: Designed for straightforward setup, the stack adapter allows for quick modifications, making it ideal for both professionals and DIY enthusiasts. Compatibility: Specifically engineered for use with oil pump drive components, it provides a dependable solution for your automotive needs. Enhance your engine's performance with the Peterson Fluid Systems Stack Adapter, an essential part for any serious enthusiast.