Mishimoto MMHOSE-WRX-15BK Black Silicone Radiator Hose Kit 2015-2021 Subaru WRX

Vehicle Fitment

• 2015-2021 Subaru WRX (VA Chassis, Base / Premium / Limited, FA20DIT 2.0L H4 Turbo, AWD)

Fitment Notes

• Fits the Subaru WRX (non-STI) with the FA20DIT engine only. Does NOT fit the WRX STI - the STI uses the EJ257 engine with a different radiator and cooling system layout.
• Compatible with both the OEM stock radiator and the Mishimoto Performance Aluminum Radiator for the 2015-2021 WRX (MMRAD-WRX-15).
• Worm-gear clamps are included - no additional clamps need to be sourced separately for the 3 hoses provided.
• This is the black colorway. Sister SKUs are available in blue (MMHOSE-WRX-15BL), red (MMHOSE-WRX-15RD), and neon yellow.
• Maximum operating temperature: 330°F (165°C).
• This radiator hose kit covers the upper, lower, and overflow hoses only. For PCV and coolant ancillary line upgrades, see the Mishimoto Ancillary Hose Kit (MMHOSE-WRX-15ANCBK). For airbox hose upgrades, see the Mishimoto Airbox Hose Kit (MMHOSE-WRX-15ABBK).

Features

• Direct OEM-fit silicone radiator hose kit engineered specifically for the 2015-2021 Subaru WRX VA chassis - upper hose, lower hose, and overflow port hose all formed to match factory FA20DIT cooling system routing geometry for drop-in installation.
• 4-ply silicone construction with heat-resistant embedded fibers provides superior pressure tolerance and heat resistance compared to the OEM rubber hoses, which degrade over time from heat cycling, coolant chemistry, and age.
• Rated to 330°F (165°C) - permanently resistant to cracking, swelling, hardening, and collapse under sustained performance driving, track use, and high ambient temperature conditions.
• Smooth internal silicone bore allows unrestricted coolant flow without the restriction potential of accordion-style corrugated OEM hose sections that can collapse at higher boost pressures.
• Worm-gear clamps included with the kit - everything needed for a complete hose replacement of all three positions is provided in the box with no additional hardware required.
• Pairs naturally with the Mishimoto performance aluminum radiator (MMRAD-WRX-15), ancillary hose kit (MMHOSE-WRX-15ANCBK), and airbox hose kit (MMHOSE-WRX-15ABBK) for a comprehensive silicone hose overhaul on the FA20DIT cooling system.
• Black finish provides a clean, aggressive engine bay appearance that complements both stock and modified VA WRX builds.
• Installation difficulty rated Easy. Backed by the Mishimoto Lifetime Warranty.

Specifications

• Hose Material: 4-ply silicone with heat-resistant embedded fibers
• Color: Black
• Maximum Operating Temperature: 330°F (165°C)
• Quantity: 3 silicone hoses (upper radiator hose, lower radiator hose, overflow port hose)
• Clamps Included: Yes - 4x worm-gear clamps
• Engine Code: FA20DIT (2.0L H4 Turbocharged Direct Injection)
• Chassis: VA
• Drivetrain: AWD

Included Components

• 1x Upper radiator hose, black 4-ply silicone
• 1x Lower radiator hose, black 4-ply silicone
• 1x Coolant overflow port hose, black 4-ply silicone
• 4x Worm-gear clamps
• Mishimoto Lifetime Warranty

Product Description

The Mishimoto MMHOSE-WRX-15BK is a direct OEM-fit silicone radiator hose kit engineered for the 2015-2021 Subaru WRX with the FA20DIT 2.0L turbocharged direct-injection flat-four engine. The kit includes the three primary radiator circuit hoses - upper, lower, and coolant overflow port - plus four worm-gear clamps, giving the installer everything needed for a complete hose replacement in a single package. Each hose is constructed from four layers of high-grade silicone with heat-resistant embedded fibers, rated to 330°F. Unlike the OEM rubber hoses that progressively harden, crack, and degrade from heat cycling and coolant exposure, the silicone construction permanently maintains its shape, elasticity, and sealing properties over the life of the vehicle.

The smooth internal bore of each silicone hose provides unrestricted coolant flow from radiator to engine and back, without the restriction potential of the corrugated accordion-style sections found in some OEM hose designs that can deform under pressure. On a boosted FA20DIT platform - particularly one that sees regular track or performance driving - maintaining consistent coolant flow is critical to preventing thermal buildup that accelerates engine wear. The Mishimoto hose kit is fully compatible with the OEM stock radiator and the Mishimoto Performance Aluminum Radiator (MMRAD-WRX-15), making it a natural companion to a full cooling system upgrade. All three hoses are formed to match the factory VA chassis routing geometry exactly, requiring no trimming or modification for proper fitment.

This kit is specific to the 2015-2021 Subaru WRX and does not fit the WRX STI, which uses the EJ257 engine with a different cooling layout. For owners pursuing a complete silicone hose overhaul of the VA WRX, Mishimoto offers complementary kits for the ancillary PCV and coolant lines (MMHOSE-WRX-15ANCBK) and the airbox hoses (MMHOSE-WRX-15ABBK), all available in matching black. Installation is rated easy, typically completed in under an hour, and all necessary clamps are included. Covered by the Mishimoto Lifetime Warranty.