Hey there! If you're looking for a solid silicone hump coupler hose, let me tell you about the HPS 3-1/2" model. This thing is built tough with a 4-ply reinforced design that can handle some serious heat—up to 350°F (that's about 177°C for those who like Celsius). It's made from high-quality silicone rubber and knitted polyester fabric, so you know it’s not just some cheap knockoff.
This 6-inch long coupler is perfect for connecting two hard pipes while allowing for a bit of flex. Whether you're dealing with high-performance racing setups or just need something reliable for your truck or off-road rig, this hose can handle the vibrations and movements without popping off or causing leaks. It’s got an inside diameter of 3-1/2" (89mm) and an outside diameter of 3.9" (99mm), plus a wall thickness of 5mm, so it’s sturdy enough for whatever you throw at it.
Professionals across various industries trust this hose—from racing and commercial trucking to marine applications and even agricultural use. Just keep in mind, this silicone hose isn’t meant for fuel or oil, but it works great with water or coolant, so you can use it in your cooling systems without a hitch.
Technical Specs:
- Product Type: Straight Hump Coupler
- Temperature Range: -65°F to +350°F (177°C)
- Reinforced Layer: 4-ply
- Hose Inside Diameter: 3-1/2" (89mm)
- Hose Outside Diameter: 3.9" (99mm)
- Wall Thickness: 5mm
- Hose Length: 6"
A Quick Note:
This silicone hose is NOT compatible with fuel or oil, but it’s perfect for water or coolant applications.
⚠ 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.