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The COBB 15-21 Subaru WRX / 14-18 Forester XT Silicone Radiator Hose Kit does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number B43400-BK, complete vehicle, engine and transmission configuration, factory equipment, required calibration, emissions eligibility, interfaces, and every product note before ordering.
Key Features
- Exact COBB manufacturer part number for reliable identification
- Purpose-built hoses configuration
- Vehicle, drivetrain, interface, color, finish, size, software, and included-component details remain part-number specific
- Calibration, emissions eligibility, factory-equipment compatibility, installation, and supporting-part requirements must be confirmed
Fitment
| Fitment Status | Fitment Verification Required |
|---|---|
| Vehicle YMM | Not assigned without exact application evidence |
| Required Verification | Confirm exact vehicle, engine, transmission, factory equipment, calibration, emissions eligibility, interfaces, and part number |
Specifications
| Manufacturer | COBB |
|---|---|
| Manufacturer Part Number | B43400-BK |
| Product Type | Hoses |
| Fitment Type | Fitment verification required |
What's Included
One new COBB product in the exact configuration and quantity identified by manufacturer part number B43400-BK. Calibrations, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, tools, and companion components are included only when expressly stated for this exact part number.
About COBB
COBB develops engine-management, intake, cooling, exhaust, drivetrain, suspension, and vehicle-accessory products for supported performance platforms. Correct selection remains exact-vehicle, exact-configuration, exact-interface, and exact-part-number specific.
Related COBB Products
- Cobb 08-14 Subaru WRX / 08-21 STI Silicone Radiator Hoses
- Cobb 22-24 Subaru WRX Silicone Radiator Hose Kit
- Cobb 08-17 Subaru WRX / 05-09 Legacy GT / 2.5GT Black Silicone Top Mount Intercooler Coupler
Browse the COBB collection for related tuning, intake, cooling, exhaust, drivetrain, and chassis products.
Frequently Asked Questions
Why is fitment verification required for this COBB product?
Exact vehicle application evidence is not complete enough for safe YMM. Confirm the vehicle, drivetrain, factory equipment, calibration, emissions eligibility, interfaces, and exact part number before ordering.
Are all supporting parts included?
Only components expressly listed for the exact manufacturer part number are included. Tuning, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, and companion components may be separate.
Is tuning or calibration required after installation?
Requirements depend on the exact product and vehicle. Intake, fuel, boost, turbo, and engine-management changes may require a compatible calibration before operation.
Installation Instructions
Follow the current COBB and factory service instructions for this exact part number. Verify fitment, factory equipment, emissions eligibility, required calibration, software and firmware, interfaces, hardware, fluid or electrical connections, and clearances before installation. Inspect the completed work and confirm safe operation before full-load use.
COBB
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Fabrication
Shop automotive fabrication parts, tubing, fittings, hoses, clamps, and welding supplies at Black Ops Auto Works. Find components for custom exhaust routing, intake plumbing, fuel and oil lines, mounting solutions, and heat protection. Compare materials and hardware from Vibrant Performance, Stainless Bros, Ticon Industries, Radium Engineering, Mishimoto, Kooks, and other brands by exact dimensions and intended application. Stainless Steel, Aluminum, and Titanium Tubing Choose tubing, bends, and fabrication sections for your project’s routing and material requirements. This collection includes steel, aluminum, and titanium tubing categories, with selected T304 and SS321 stainless products. Compare outside diameter, wall thickness, straight length, bend angle, and centerline radius before planning cuts and joints. Explore the Stainless Bros collection for additional stainless tubing, mandrel bends, pie cuts, flanges, and exhaust fabrication components. Exhaust Flanges, Clamps, and Sl...
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Hoses
Performance hoses for cooling, fuel, vacuum, and boost applications are stocked at Black Ops Auto Works. Shop silicone radiator hoses, braided fuel hoses, PTFE hose, vacuum line, heater hose, and turbo boost hose kits for import, domestic, and European platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 569 hose SKUs spanning cooling, fuel, and forced induction plumbing. What This Category Covers The Hoses category covers flexible plumbing used to move coolant, fuel, air, vacuum signal, and crankcase gases around the engine bay. Coverage spans OE-style rubber replacement hose through silicone and PTFE upgrades built for boosted, high-temperature, and race applications. Categories Included Silicone radiator and coolant hose kits, braided and PTFE fuel hose, vacuum and boost hose, heater hose, and turbo inlet and outlet hose. Material options include reinforced silicone, EP...
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