If you’re looking to bridge the gap between two different pipe sizes, the HPS 3 1/4" to 3 1/2" Silicone Reducer Coupler Hose in black is a solid choice. This isn’t just any hose; it’s built tough with a 4-ply reinforced design that can handle some serious heat. We’re talking about a temperature range from -65°F to a blistering +350°F (that’s about -54°C to 177°C for you metric folks). It’s made from high-quality silicone rubber and knitted polyester fabric, so you know it’s ready for whatever you throw at it, whether that’s in a race car or a rig on the job site.
This coupler is perfect for those times when you need to connect different sized intercoolers, turbos, or intake components. It’s designed to transition smoothly between pipes, making your installation process a lot less of a headache. With an inside diameter of 3 1/4" (83mm) to 3 1/2" (89mm) and an outside diameter of 3.66" to 3.90" (93mm to 99mm), it fits snugly without any fuss. Plus, the wall is a solid 5mm thick, so it’s built to last.
Professionals in all sorts of industries use these hoses—think high-performance racing, commercial trucks, marine applications, and even agricultural machinery. They’re versatile and reliable, which is exactly what you want when the stakes are high.
A couple of things to note:
This silicone hose isn’t meant for fuel or oil, but it works great with water or anti-freeze, like coolant. So keep that in mind when you’re planning your setup!
In short, if you need a reliable, high-performance reducer coupler that can take the heat and help you make those crucial connections, this HPS hose is a no-brainer.
⚠ 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.