COBB Charge Pipe Subaru WRX (2015-2021) CARB/Smog Legal - 742110

Fitment Information

• Subaru WRX Sedan (2015, 2016, 2017, 2018, 2019, 2020, 2021)
  
  • Fits Models with Automatic and Manual Transmission
    

Emissions Compliance

• 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-660-68 / D-660-218 / D-660-254

Specs & Features

• Flow & Durability: Constructed from mandrel-bent 6061 Aluminum to eliminate the expansion and cracking issues common with the factory plastic pipe.
• Smart Sizing: Features an integrated billet transition that smooths airflow from 2" to 2.5", maximizing volume while retaining Clearance for Aftermarket Radiators.
• Stealth Finish: Coated in a durable Wrinkle Black Powder Coat that blends perfectly with the intake manifold for a clean, professional "OEM+" appearance.
• Leak-Free Install: Includes a custom Billet Turbo Adapter and heavy-duty 5-Ply Silicone Couplers to ensure a tight seal even under high boost pressures.
• Versatile Fitment: Designed to work seamlessly with the Stock Bypass Valve or the COBB LF BPV, and fully compatible with COBB OTS Maps (no custom tuning required).

Product Description

If you own a VA-chassis WRX, you are driving with a ticking time bomb: the stock charge pipe. Subaru built the factory unit out of plastic. Over time, the heat from the turbo makes that plastic brittle, and the flange eventually cracks or separates, causing a massive boost leak that leaves the car stranded. The COBB Tuning Charge Pipe is the permanent solution to this problem, replacing the restrictive plastic with rigid, free-flowing aluminum.

A massive pipe is useless if it rubs against everything in the engine bay. COBB engineers designed this kit with a unique Billet Transition piece. It gradually expands the diameter from the turbo outlet (2") to the throttle body side (2.5"). This "stepped" design not only smooths out the airflow turbulence but also keeps the pipe tucked in tight. This means if you decide to upgrade to a thick aftermarket radiator (like a Koyo or Mishimoto) for track days later, this pipe will still fit without rubbing.

Nobody likes an engine bay that looks like a mismatched puzzle. COBB finished this tubing in a signature Wrinkle Black Powder Coat. It looks tough, resists scratches, and matches the texture of the factory intake manifold perfectly. It looks like the part Subaru should have installed at the factory.

This is one of the most practical upgrades for the 2015-2021 WRX. It isn't just about adding a shiny part; it's about reliability. By eliminating the expansion and potential failure of the stock plastic, COBB ensures the boost pressure actually makes it to the engine. Whether the car is stock or fully built, this charge pipe provides the consistent flow and durability required for a healthy FA20DIT.