The COBB 15-18 Subaru WRX Top Mount Intercooler – Silver (Requires COBB Charge Pipe) does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number B42405-SL, complete vehicle, engine and transmission configuration, factory equipment, required calibration, emissions eligibility, interfaces, and every product note before ordering.

Key Features

• End Tanks: Cast 6061-T6 aluminum construction handles high pressures and resists cracking under boost.
• Direct Fit Design: Bolts into factory locations using OEM shroud and ducting for simple swap.
• Bar-and-Plate Core: 21.5″ x 12.25″ x 3.0″ dimensions provide 546% more volume than stock for rapid heat rejection and stable IATs.
• Silver Powder Coat: Durable finish protects against corrosion and heat while matching engine bay components.
• USA Made: Built with precision welding and quality materials for long-term durability.
• Requires COBB SF Charge Pipe Kit (part 47505B or similar) due to larger core thickness.

Fitment

Specifications

What’s Included

One new COBB product in the exact configuration and quantity identified by manufacturer part number B42405-SL. 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 15-18 Subaru WRX Top Mount Intercooler – Black (Requires COBB Charge Pipe)
• Cobb 22-24 Subaru WRX Top Mount Intercooler Kit – Silver
• Cobb 08-14 Subaru WRX/STI Front Mount Intercooler Core – Silver

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.