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SKU: BB43400-BK | UPC: 731946518327
Cobb 15-21 Subaru WRX / 14-18 Forester XT Silicone Radiator Hose Kit
The Cobb Silicone Radiator Hose Kit replaces factory rubber hoses on 2015-2021 Subaru WRX and 2014-2018 Forester XT with durable 4-ply silicone construction. These hoses resist cracking from high boost and engine heat, ensuring reliable coolant flow for consistent performance. Ideal for stock or modified FA20 engines demanding dependable cooling.
Key Features
- 4-Ply Reinforced Silicone: Handles continuous temperatures from -40°F to 428°F and burst pressures over 250 PSI for long-term reliability.
- Direct OEM Replacement: Upper and lower hoses match factory routing and lengths with no cutting, trimming, or fabrication needed.
- Superior Durability: Outperforms stock rubber hoses that degrade under boost, preventing leaks and overheating failures.
- Smooth Interior Bore: Promotes efficient coolant flow while resisting collapse under vacuum or pressure.
- Black Finish: Clean, factory-like appearance that integrates seamlessly into the engine bay.
Product Notes
- Kit includes upper radiator hose and lower radiator hose only; turbo inlet/outlet hoses sold separately.
- Compatible with OEM and direct-fit aftermarket radiators.
- Packaged for protection during shipping; inspect upon receipt.
Installation Notes
- Professional installation recommended.
- Approx. 0.5 hour install time with basic hand tools; drain coolant first.
- Reuses OEM spring clamps; T-bolt clamps optional for higher boost setups.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base, Premium, Limited |
| 2014-2018 | Subaru | Forester | 2.0XT |
Why Choose Cobb?
- Subaru performance leader with 20+ years developing bolt-on parts.
- Rigorously tested on street, dyno, and track for real-world results.
- Precision-engineered for exact fit and peak function.
Frequently Asked Questions
-
Q: Does this kit fit 2018 WRX Limited models?
A: Yes, direct fit for all 2015-2021 Subaru WRX variants including Base, Premium, and Limited with FA20DIT engine. -
Q: What is the hose material and temperature rating?
A: 4-ply reinforced silicone rated -40°F to 428°F continuous with 250+ PSI burst strength. -
Q: Are clamps included and is warranty coverage provided?
A: Uses OEM clamps; backed by Cobb's limited lifetime warranty against manufacturing defects.
Shipping & Handling
- Method: UPS Ground / USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective box measuring 12 x 10 x 4 inches
- Weight: 2.0 lbs
COBB
COBB Tuning Performance Parts deliver proven power gains with factory-like drivability backed by an "Engineered Performance" approach trusted by enthusiasts, pro tuners, and performance shops worldwide. Founded in 1999 and now headquartered in Austin, Texas, COBB designs, engineers, tests, and supports its products in-house to ensure reliable results across today's most popular performance platforms. Shop the full lineup of COBB Tuning performance parts at Black Ops Auto Works, including ECU tuning solutions, bolt-on upgrades, and staged power packages built to work together for predictable, repeatable performance. COBB ECU Tuning & Accessport The COBB Accessport is one of the most trusted ECU tuning devices in the industry. It enables safe ECU flashing, live data monitoring, diagnostics (read/clear codes), and tuning management helping drivers unlock stronger throttle response, improved drivability, and dependable horsepower and torque gains when paired with the right supportin...
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Fabrication
Shop Fabrication Parts & Materials at Black Ops Auto Works for stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, V-band clamps, flanges, merge collectors, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, welding supplies, brackets, bungs, and hardware for building custom exhaust systems, turbo plumbing, intercooler piping, fuel systems, and engine bay routing. Start with tubing (304 or 321 stainless, titanium, or aluminum) in the right diameter and wall thickness, then add mandrel bends, flanges, V-bands, and clamps to complete the joint work. AN plumbing follows the same pattern: match dash size to horsepower target, pair the right hose (PTFE or CPE) with matching hose ends, and use adapters, bulkheads, and distribution blocks to route fuel, oil, and coolant cleanly. Shop by material (stainless, titanium, aluminum), fitting type (AN, ORB, NPT), diameter, or brand (Vibrant, Ticon, Stainless Bros, Radium, Fragola, DEI, ATP). ...
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Hoses
Welcome to our curated collection of hoses for your vehicle. Here, you'll find a range of products designed to meet all your automotive needs. Whether you are looking for replacement hoses or upgrades, we have you covered! Why Choose Our Hoses? Durability: Our hoses are made from high-quality materials that ensure longevity and reliability. Compatibility: Designed to fit a variety of vehicle makes and models. Performance: Enhance your vehicle's performance with our specialized hoses. Easy Installation: Many of our hoses come with user-friendly installation instructions. Types of Hoses Available Radiator Hoses: Keep your engine cool with our top-of-the-line radiator hoses. Heater Hoses: Ensure optimal heating performance in your vehicle with durable heater hoses. Fuel Hoses: Maintain efficient fuel delivery with our high-quality fuel hoses. Brake Hoses: Enhance your vehicle's safety with reliable brake hoses. Shop with Confidence Our collection of hoses for your vehic...
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