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HPS Performance Products 3.5 to 4.5 Inch Black Silicone Reducer Coupler Hose, 4-Ply, 4 Inch Long - HTSR-350-450-L4-BLK
HPS Performance Products 3.5 to 4.5 Inch Black Silicone Reducer Coupler Hose, 4-Ply, 4 Inch Long - HTSR-350-450-L4-BLK - Image 2 HPS Performance Products 3.5 to 4.5 Inch Black Silicone Reducer Coupler Hose, 4-Ply, 4 Inch Long - HTSR-350-450-L4-BLK - Image 2

HPS 3-1/2" to 4-1/2" High Temp Silicone Reducer Coupler Hose

Alright, gearheads and DIY enthusiasts, let’s talk about this HPS silicone reducer coupler hose. If you’re looking to make some serious connections in your custom build or just need something that can handle the heat, this is it. This hose is built tough, meeting SAEJ20 standards, which means it’s ready for some heavy-duty action.

What really sets this coupler apart is its 4-ply reinforced design. That means it can take on high-pressure situations without breaking a sweat. Whether you’re working on turbo setups, intercooler piping, or even a DIY intake or radiator system, this hose has got your back. It’s perfect for marine and industrial applications too, so you know it’s versatile.

Now, let’s get into the nitty-gritty. This bad boy has an inside diameter range of 3.5" to 4.5" (that’s 89mm to 114mm for you metric folks) and an outside diameter of 3.9" to 4.88" (99mm to 124mm). At 4 inches long, it’s just the right size to fit in tight spaces without fuss. The wall thickness is a solid 4.5mm, ensuring durability without sacrificing flexibility.

Temperature-wise, this hose can handle anything from -65°F to a blazing 350°F (177°C). So whether you’re in the dead of winter or the heat of summer, you won’t have to worry about it failing on you. Plus, it’s UV and ozone resistant, which is a huge plus if you’re using it in harsh environments.

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.

Features:

  • High Temperature 4-ply Reinforced Silicone
  • Meets and exceeds SAEJ20 standards for heavy-duty pressure connections
  • Perfect for custom turbo, intercooler piping, and DIY radiator systems
  • UV and ozone resistant for long-lasting performance
  • Not suitable for fuel or oil applications

Specifications:

  • Type: Silicone Reducer Coupler Hose
  • Color: Black
  • Inside Diameter: 3-1/2" - 4-1/2" (89mm - 114mm)
  • Outside Diameter: 3.9" - 4.88" (99mm - 124mm)
  • Length: 4"
  • Reinforced Layer: 4-ply Polyester
  • Max Temperature Rating: 350°F
  • Wall Thickness: 4.5mm
  • Oil-Resistant: No
  • UPC: 648044837130
Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

HPS Performance Products Logo

About HPS Performance Products

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 Hoses

HPS 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 Racing

Vivid 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.

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