If you're looking to swap out those stock rubber hoses on your 2015-2016 Subaru WRX STI, let me tell you about the HPS High Temp 3-ply Reinforced Silicone Radiator and Heater Hose Kit. Trust me, this isn't just any upgrade—it's a game changer. Those OEM hoses might work fine for a while, but over time, they can weaken and leave you stranded when you least expect it. I've seen it happen, and it’s never pretty.
This kit is built from premium-quality silicone, designed to handle the intense heat and pressure that our turbocharged engines throw at it. With a max temperature rating of 350°F (that’s 177°C for you metric folks), you can push your car hard—whether you're on the track or just cruising around town—and know that your cooling system is up to the task.
What really sets this kit apart is the attention to detail in the design. Each hose has the right bends and curves for a perfect fit, making installation a breeze. Forget about those universal hoses that leave you wrestling with awkward angles; this kit is tailored specifically for the WRX STI. And don’t worry about installation—HPS includes 100% stainless steel clamps that are industrial grade. They won’t cut through the hoses like some cheaper options out there, so you can install them with confidence.
To sum it up, if you’re serious about performance and reliability, this silicone radiator and heater hose kit is a solid investment. It’s not just a replacement; it’s an upgrade that can make a real difference in how your car performs over time. Plus, it looks slick in black, which is always a bonus under the hood.
Specifications:
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2015-2021 Subaru STI |
STI | 2015-2021 |

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.