1/2" ID Hi
Performance Silicone Caps for Coolant, Water, Air, Vacuum, Emission, Water
Ports, Turbos, and more.
Reinforced
3-Ply Silicone Bypass Cap with black stainless clamp,
Throttle Body, Water Ports, Heater Cores
Packed 1 clamp + 1 black SS clamp per package
High
Performance 1/2" ID (13mm) Reinforced Silicone Coolant Cap - High Temp – Black/Green
Enhance
your vehicle's cooling system with these high-performance high temperature reinforced black silicone caps.
Engineered
to handle high temperatures and pressures, this 3-ply polyester reinforced cap
provides unmatched durability
compared to traditional rubber coolant caps that may crack and leak over time.
Specifications:
Product
Type: 3-ply Polyester Reinforced Silicone Coolant Cap
Inside
Diameter: 1/2" (
1/2" ID Silicone Manifold Cap w Clamp High Temp for Coolant, Vacuum & Turbo
Description
This 1/2 inch inside diameter silicone manifold cap is designed to seal open hose ports in
coolant, air, vacuum, and turbo systems. Molded from reinforced high-temperature silicone, it
resists heat, pressure, oil vapor, and under-hood chemicals for long service life in demanding
engine bay environments.
Ideal for blocking unused fittings during engine builds, diagnostics, or permanent deletes, this
cap delivers a tight, leak-free seal on metal and plastic barbs. Commonly used in automotive,
performance, and professional repair settings where reliability under heat and boost is critical.
Includes one 1/2" silicone cap and one stainless worm-drive clamp for secure installation.
Specifications
Inside diameter: 1/2" (13 mm)
Material: Reinforced silicone rubber
Color: Black
Temperature range: −40°F to 392°F (−40°C to 200°C)
Design: Closed-end hose cap
Function: Port sealing, vacuum block, coolant line cap
Use environment: Under-hood / high-temperature automotive
Key Uses
-
Vacuum line and manifold port blocking
-
Coolant hose deletes and reroutes
-
Turbo and boost reference sealing
-
Intake and emissions system cleanup
-
Diagnostic and test configurations
Common Applications
Automotive engines, turbo systems, intake manifolds, vacuum networks, coolant lines,
motorsports builds, performance shops, and professional repair bays.
Application & Fitment Disclaimer
This silicone cap is a universal aftermarket part intended for general automotive use. Vehicle
manufacturers use different hose materials, wall thicknesses, and barb styles. Always measure
your hose or fitting before ordering to confirm proper fit. Professional installation is
recommended for pressurized or high-temperature systems. This product is not manufactured,
endorsed, or affiliated with any vehicle or engine brand; all brand names are used only to
describe typical applications.
Package Options
Single 1/2" cap with stainless clamp. Other sizes are available in separate listings.
Service
Ships from California, USA warehouse
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10 percent discount on 2 or more packs
Free shipping with tracking included