Mishimoto MMHOSE-STI-08BK Silicone Radiator Hose Kit for 08-21 Subaru STI/WRX

Vehicle Fitment

• 2008-2021 Subaru WRX STI (EJ257 2.5L Turbo)
• 2008-2014 Subaru WRX (EJ255 2.5L Turbo)
• Includes common trims and performance variants
• Legacy GT, Forester XT, and other models also compatible (check individual fitment)

Features

• Direct OEM-replacement silicone radiator hose kit
• High-grade silicone with heat-resistant embedded fibers
• Increases pressure tolerance vs. stock rubber hoses
• Helps reduce engine bay heat soak and coolant temp spikes
• Improved longevity and damage resistance over OEM hoses
• Black finish for enhanced engine bay aesthetics
• Includes quality worm-gear clamps for secure installation
• OEM-style fitment - no cutting or fabrication needed
• Backed by Mishimoto Lifetime Warranty

Specifications

• Part Number: MMHOSE-STI-08BK
• Material: Multi-layer reinforced silicone
• Color: Black
• Application: Radiator coolant hose replacement
• Max Temperature Rating: ~330 °F (~165 °C)
• Hoses Included: Upper & lower radiator hoses
• Clamps Included: 4x worm-gear style
• Compatible Engines: EJ257 (STI), EJ255 (WRX)

Included Components

• 2x Silicone radiator hoses
• 4x Worm-gear clamps
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMHOSE-STI-08BK Silicone Radiator Hose Kit is engineered to upgrade and replace the factory rubber radiator hoses on turbocharged Subaru Impreza WRX and WRX STI models. Designed with multi-layer silicone reinforced with heat-resistant embedded fibers, this kit increases pressure tolerance and helps manage engine bay heat more effectively than OEM hoses - especially beneficial in tuned, high-performance, or track-oriented vehicles.

This direct-replacement hose kit fits WRX models from 2008-2014 and STI models from 2008-2021, providing an OEM-style fit without cutting or modification. The sleek black silicone finish not only enhances cooling system reliability but also gives a clean engine bay aesthetic. Included worm-gear clamps ensure secure, leak-free hose connections, and the whole kit is backed by Mishimoto's Lifetime Warranty for long-term peace of mind.