COBB Top Mount Intercooler For 2015-21 Subaru WRX - Silver (Requires COBB Charge Pipe) - B42405-SL
COBBB42405-SL
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SUBARU TOP MOUNT INTERCOOLER SILVER WRX 2015-2021
Emissions
50 State Legal.
This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number:
D-660-69
DESCRIPTION
The COBB Top Mount Intercooler for the Subaru WRX offers a significant increase in overall airflow as well as more efficient cooling than other top mount intercoolers currently available.
Cast aluminum end tanks direct charge air through a high quality Garrett core for unmatched cooling. This intercooler not only features the largest core available for the DIT WRX (15.75" x 9.65" x 3.94"), but remains easier to install than other popular options.
To handle the added weight of the COBB intercooler core, a heavy-duty replacement mounting bracket is used on the passenger side. An included bushing isolates vibrations from the engine block.
Reinforced black silicone couplers are included to complete the installation, maximizing the flow path from turbocharger to throttle body.
The included COBB Thrust Tunnel is constructed of wrinkle black powder coated aluminum and attaches to the factory hood ducting to maximize airflow through the core.
COBB Charge Pipe Kit is required for installation.
WHY?
Upgrading the intercooler on your 2015 and newer WRX can help to both increase airflow and reduce charge air temperatures, leading to more power! Where a front-mounted intercooler may shine with overall cooling capacity, it comes at the price of transient response. The COBB Top Mount Intercooler is perfect for applications where additional airflow and cooling is desired without the need to support a large upgraded turbocharger.
FEATURES
- 31% Airflow Increase Over Stock Intercooler
- Thrust Tunnel Maximizes Airflow from Hood Duct
- Largest Core Available
- Most Efficient Cooling Available
- Installation Requires COBB Charge Pipe Kit
Installation Instructions
Installation Instructions
Fitment
Fitment

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$985.00
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