If you’re diving into some serious performance upgrades or just need a solid connection for your custom setup, this HPS silicone reducer coupler hose is a great pick. It’s designed to handle the heat—literally. With a temperature range from -65°F to 350°F, you can trust it won't buckle under pressure, whether you're pushing your engine to the limit or cooling things down.
This isn’t just any hose; it’s a 4-ply reinforced beauty that meets and even exceeds SAEJ20 standards. That means it’s built tough for heavy-duty pressure connections. Whether you’re working on a turbo setup, intercooler piping, or even a DIY intake or radiator cooling system, this hose has got your back.
Let's talk specifics: it fits inside diameters of 4" to 5" (102mm to 127mm) and has an outside diameter ranging from 4.41" to 5.39" (112mm to 137mm). Plus, with a wall thickness of 4.5mm, it’s sturdy enough to withstand the rigors of high-performance applications without missing a beat. Just a heads up though—this silicone hose isn’t compatible with fuel or oil, so keep that in mind when you’re planning your setup.
Overall, if you’re looking for a reliable and tough coupler hose to complete your project, this HPS option is worth considering. It’s built to last and can handle whatever you throw at it.
⚠ 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.