Mishimoto Silicone Radiator Hose Kit Black Honda Civic Si 2012-2015 | MMHOSE-CIV-12SIBK

Overview

The Mishimoto silicone radiator hose kit for 2012-2015 Honda Civic Si delivers superior cooling performance and durability compared to restrictive factory rubber hoses. Engineered specifically for the R18Z4 engine, this complete hose replacement system reduces heat soak and maintains consistent coolant flow under extreme driving conditions. Perfect for track enthusiasts, autocross competitors, and daily drivers seeking reliable cooling system upgrades.

Key Features & Benefits

• High-Grade Silicone Construction - Withstands temperatures up to 330°F while resisting cracking, hardening, and degradation that plague OEM rubber hoses
• Improved Flow Design - Smooth interior walls and optimized bend radius reduce turbulence and pressure drop for maximum cooling efficiency
• Direct OEM Replacement - Precision-molded to exact factory specifications for seamless installation with factory clamps and connections
• Lifetime Warranty - Backed by Mishimoto's comprehensive lifetime warranty for ultimate peace of mind
• Aggressive Styling - Sleek black finish enhances engine bay appearance while providing functional cooling upgrades

What's Included

• Upper radiator hose
• Lower radiator hose
• Heater hoses (inlet and outlet)
• All necessary silicone connections
• Installation hardware
• Mishimoto lifetime warranty

Specifications

Fitment & Compatibility

This Mishimoto silicone hose kit is engineered specifically for 2012-2015 Honda Civic Si models equipped with the 2.4L R18Z4 naturally aspirated engine. Compatible with both coupe and sedan body styles. Direct replacement for OEM part numbers 19501-R40-A01, 19502-R40-A01, and related cooling system components. Not compatible with other Civic trim levels or engine configurations.

Installation

Direct bolt-on installation using factory mounting points and clamps. Recommended to replace coolant and properly bleed cooling system during installation. Installation time approximately 2-3 hours for experienced DIY mechanics. Professional installation recommended for optimal results and warranty compliance.