Here is the HPS 9/16″ (14mm) ID, 1-5/8″ Long Blue Silicone Reinforced Coolant Cap w/Clamp For Bypass Heater Vacuum Valve Water Port, listed with the specifications that actually decide whether it fits.

Reinforcement ply count determines burst strength, which matters most on boosted applications. Measure inner diameter at the fitting rather than estimating by eye.
The clamp for bypass heater vacuum listed here is checked against your vehicle before dispatch.
Every clamp for bypass heater vacuum order goes through the same fitment review.
Ordering the clamp for bypass heater vacuum takes a minute and the confirmation reaches you straight away.
Our team knows the clamp for bypass heater vacuum well, so ask if anything about the specification is unclear.
Stock of the clamp for bypass heater vacuum is live on this page rather than estimated.
Shops order the clamp for bypass heater vacuum from us in volume because the data on the page is accurate.
If your build is unusual, tell us and we will confirm the clamp for bypass heater vacuum against it.
Part details
- Material: Silicone
- Finish: Blue
- Category: Universal Hose
- Price: $27.95 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
The HPS Performance 9/16″ (14mm) high temperature reinforced Blue silicone cap is designed specifically to be installed on your cooling system. Vacuum caps have no reinforcement and are intended for vacuum and very little pressure. The HPS reinforced silicone caps are manufactured just like our reinforced silicone radiator hoses. While traditional rubber coolant cap might crack and cause coolant leak, HPS Performance high temperature 3-ply polyester reinforced silicone caps will withstand the high temperatures and pressures of your cooling system for years to come.
HPS Reinforced Silicone Caps are compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Technical Specification
Product Type: Reinforced Silicone Coolant Cap
HPS Part Number: RSCC-055-BLUE
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 3-ply Polyester
Inside Diameter: 9/16″ (14mm)
Color: Blue
Wall Thickness: 4mm
Inside Length: 1-3/16″
Overall Length: 1-5/8″
UV and ozone resistant
Remark: HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
- Material: 3-Ply Reinforced Polyester Silicone
- Color: Blue
- Made of High Temperature 3-ply Polyester Reinforced Silicone. Maximum Temperature Rating: 350 deg. F (177 deg. C).
- Ideal for heavy duty pressure connections and provides excellent resistance for high temperature applications
- Compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
- Inside Diameter: 9/16″ (14mm). Overall Length: 1-5/8″
- HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
Come with a HPS Brand Stainless Steel clamp (match Size) to complete your project
Application:
HPS Reinforced Silicone Caps are Universal Fit that compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Remark:
Installation: Compatible with Water/Coolant ONLY, Not for Fuel/Oil
Product Content:
- 1 x Coolant Cap
1 x Clamp
The product does not come with manual/instruction, Professional Install Recommended
Cross Reference Number:
- RSCC-150-BLUE, EMSC-40-60, RSCC150BLUE, EMSC4060, 648044901138, 648044825557
Shops ordering in volume can send a full parts list and we will verify the whole job in one reply.
Customers also open: Hoses & Fittings · HPS 3.12″ (80mm) ID, 6″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · HPS 3.12″ (80mm) ID, 4″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · full catalog
Orders are checked against your vehicle details before they are sealed, then dispatched quickly.
Background reading that is not trying to sell you anything: the fuel economy maintenance guidance.
Common questions
Will this part fit my vehicle?
Share your vehicle details with our team and we cross reference this listing before dispatch. Anything doubtful gets a message from us rather than a shipment.
How quickly can I get this?
Your tracking link arrives by email at label creation and stays live until delivery, so you can follow the parcel the whole way.
What is the return policy?
Returns are handled in one reply for most cases. Keep your order confirmation, since it is the only proof of purchase we need.
How do you verify this part?
We verify diameter and reinforcement specification on every hose order.
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