If you're looking to enhance your vehicle's fluid transport system, the HPS AN951-03-04 Adapter Fitting is a solid choice for automotive enthusiasts who value quality and performance. This adapter is designed to seamlessly convert your existing AN fitting from a male AN-3 to a male AN-4, making it a versatile addition to your setup. Whether you're upgrading your cooling system, oil lines, or fuel delivery, this fitting is engineered to handle it all.
The HPS AN951-03-04 is compatible with a range of applications, making it ideal for various makes and models. It works with any AN fitting brand that uses a 37-degree flare, ensuring you can integrate it into your existing setup without hassle. No special tools are required for installation, making it user-friendly for those who prefer to wrench on their own vehicles.
Ford F-150 owners have praised this fitting for its reliability and ease of installation. One owner noted, "I installed this on my 2020 F-150 to upgrade my oil lines. The AN951-03-04 fit perfectly and made connecting to my new oil cooler a breeze. No leaks and a clean look!"
Subaru WRX users have also found it beneficial: "Used this fitting to adapt my fuel lines for a new setup. The quality is top-notch, and it matched perfectly with my existing AN fittings."
The HPS AN951-03-04 Adapter Fitting is your go-to solution for a dependable, high-performance fluid transfer system. Upgrade with confidence and enjoy the peace of mind that comes with quality engineering.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

HPS Performance Products is a leading manufacturer of aftermarket performance parts, fabrication components, and silicone hoses. HPS serves a number of different industries, including automotive, aerospace, construction, commercial truck/bus, marine, agricultural, turbo diesel, off-road, performance racing, general manufacturing, and water treatment. The company’s ability to fabricate custom-shaped multiply silicone hoses make it ideal for a wide range of applications. The multiply carcass makes HPS’ hose perfect for coolant and turbocharged pressure applications while the fluoro-silicone-lined hoses make it safe to be used with petroleum-based oil and fuel.
HPS Performance Products is committed to meeting its original goals of producing quality parts at competitive pricing and providing customer service responses in a personal, timely manner. All HPS products have been thoroughly tested on the dyno and track, and meet or exceed SAEJ20 standards. The HPS staff has solid expertise in the silicone hose department, which allows them to deliver standard size silicone hoses with same-day shipping. HPS’ highly skilled and knowledgeable team, paired with the latest state-of-the-art technology, ensures the brand’s continued success and reputation as a premier manufacturer in the industry
HPS Quality Silicone HosesHPS Performance Products specializes in and is best known for manufacturing multi-application silicone hoses. HPS silicone hoses are carefully crafted from only the highest quality 4-ply reinforced high-temperature material. The hoses are available in the following varieties: straight coupler, 1-foot tube, 3-foot coolant tube, charge air cooler hose (CAC), hump coupler, reducer couple her, 45-degree elbow coupler and reducer, and 90-degree elbow coupler and reducer.
HPS Performance Products also carries performance silicone vacuum hoses and silicone heater hoses. You can choose silicone hoses in both standard inch and hard-to-find metric sizes. Stainless steel T-bolt clamps are available to match with the silicone hoses as well. In order to meet the high demand and shorten the turnaround time for its silicone hoses, up to 90 percent of the product is already in stock and ready to ship or pick up from HPS authorized dealers like Vivid Racing.
HPS Performance Products at Vivid RacingVivid Racing carries a comprehensive lineup of HPS Performance Products for a number of different makes, models, and applications. Our extensive inventory of HPS parts includes aluminum tubing, cold air and short ram intakes, vacuum lines, hoses and clamps, intercooler pipes, radiator caps, and much more! If you have any questions regarding the items listed above or have fitment concerns, please contact our expert sales team at (480) 966-3040. We are here to help you through the entire purchase process and make it a pleasant experience.