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If you’re diving into the world of cooling systems, you’ll want to check out the HPS Performance 5/16" high temperature reinforced blue silicone cap. This isn’t just any old cap; it’s built for the long haul, specifically designed to handle the heat and pressure that comes with your engine's cooling system. Unlike those basic vacuum caps that can barely handle a little pressure, this silicone cap is reinforced with three layers of tough polyester webbing. Trust me, it’s made to last.
What’s great about this cap is its versatility. Whether you're dealing with coolant, water, or even air, it's got you covered. It fits perfectly on turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores—you name it. And with a temperature range that stretches from a chilly -65°F all the way up to a scorching 350°F, it can handle whatever you throw at it.
Let’s talk specs for a second. The inside diameter is 5/16" (or 8mm), which is just the right size for a snug fit. Overall, it measures 1-1/2" in length, with a wall thickness of 4mm. And don’t worry about it fading in the sun; it’s UV and ozone resistant, so it’ll keep looking sharp even after some serious exposure. Just keep in mind, this cap isn’t compatible with fuel, oil, or any petroleum-based products—so save those for something else.
Features:
- High temperature applications? No problem—rated for up to 350°F.
- Heavy-duty 3-ply polyester reinforcement means it's pressure resistant.
- Compatible with a variety of fluids and systems.
- Cool blue color that stands out in your engine bay.
- 5/16" (8mm) inside diameter for a snug fit.
- Not for use with fuel or oil—stick to coolant and water.
Specifications:
- Product Type: Silicone Reinforced Cap
- Color: Blue
- Inside Diameter: 5/16" (8mm)
- Outside Diameter: 0.62" (16mm)
- Overall Length: 1-1/2"
- Reinforced Layer: 3-ply Polyester
- Max Temperature Rating: 350°F
- Wall Thickness: 4mm
- Oil-Resistant: No
- UPC: 648044892672
So if you’re looking for a reliable, tough cap that won’t let you down, the HPS 5/16" reinforced silicone coolant cap is definitely worth considering. It’s built to withstand the heat and pressure of your cooling system, and it’ll keep your setup running smoothly for years to come.
Proposition 65
⚠ 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.
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