If you’re diving into the world of custom builds or just need a reliable hose for your setup, the HPS 1-1/4" to 1-1/2" silicone reducer coupler hose is a solid pick. This isn’t just any hose; it’s built tough with a 4-ply reinforced design that meets and even exceeds SAEJ20 industry standards. That means you can count on it for heavy-duty pressure connections without worrying about it letting you down.
This hose can handle some serious heat, with a temperature range from -65°F to a scorching 350°F (that’s about 177°C for those who prefer metric). Whether you're working on a marine project, fabricating custom turbo or intercooler piping, or just tinkering with your DIY intake or radiator cooling system, this hose has your back. It’s like having a trusted sidekick in your garage.
What's great about this coupler is its versatility. The inside diameter ranges from 1.25" to 1.5" (32mm to 38mm), which makes it a perfect fit for a variety of applications. And at 4 inches long, it’s just the right length to get the job done without being overly bulky. Plus, the outside diameter measures between 1.65" and 1.88" (42mm to 48mm), so you know it’ll fit snugly where you need it.
Another thing worth mentioning is its UV and ozone resistance. If you’re using it in an environment where it might see some sun, you can rest easy knowing it won’t break down on you. Just a heads up though: this silicone hose isn’t compatible with fuel or oil, so keep that in mind when planning your setup.
All in all, if you want a hose that’s reliable, tough, and built for performance, this HPS silicone reducer coupler hose is a fantastic choice. It’s not just about looks; it’s about getting the job done right.
⚠ 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.