The COBB 15-21 Subaru WRX FMIC Hot Pipe Kit does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number 741500-H, complete vehicle, engine and transmission configuration, factory equipment, required calibration, emissions eligibility, interfaces, and every product note before ordering.

Key Features

• 2.5″ Diameter Piping: Larger than stock 2″ pipe to handle increased airflow from FMIC upgrades, reducing backpressure and enabling 20+ whp gains.
• Reinforced Silicone Couplers: Rated to 350F with embedded stainless steel wire mesh for secure, leak-free connections under high boost.
• Stainless Steel T-Bolt Clamps: Provides constant tension and durability, preventing boost leaks even after repeated heat cycles.
• Black Powder Coat Finish: Resists corrosion and underhood heat while blending with engine bay for a clean OEM+ appearance.
• Mandrel-Bent 6061-T6 Aluminum Tubing: Ensures laminar flow with no crimps or bends, minimizing turbulence for improved throttle response and turbo spool.
• Bolt-on design takes 30-45 minutes with basic hand tools no cutting or permanent modifications needed.

Fitment

Specifications

What’s Included

One new COBB product in the exact configuration and quantity identified by manufacturer part number 741500-H. 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 15-21 Subaru WRX FMIC Cold Pipe Kit
• Cobb 15-21 Subaru WRX/STI FMIC Cold Pipe Kit
• Cobb 2022+ Subaru WRX FMIC Hot/Cold Pipe Kit

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.