COBB 616X01P Stage 1+ Power Package for 2015–2018 Subaru WRX STI

The COBB 616X01P Stage 1+ Power Package delivers the perfect entry-level performance upgrade for the 2015–2018 Subaru WRX STI. This 50-state legal package combines the world-famous COBB Accessport V3 with the COBB SF Intake System and SF Airbox, giving your STI improved airflow, smoother power delivery, and a noticeable increase in responsiveness — all while maintaining OEM-level reliability and fitment.

The Accessport V3 (AP3-SUB-004) is the leading Subaru tuning solution, providing ECU flashing, map switching, real-time monitoring, datalogging, and Off-The-Shelf maps specifically engineered for this package. Paired with the SF Intake and Airbox, the Stage 1+ package reduces airflow restrictions and helps maintain cooler intake air temperatures thanks to its composite intake body and enclosed airbox design.

Whether you’re starting your modding journey or looking for a safe, emissions-compliant upgrade path, the COBB Stage 1+ Power Package gives you the best bang for your buck with improved driveability and performance right out of the box.

Key Features & Benefits

• Complete Stage 1+ Power Package for 2015–2018 Subaru WRX STI

• 50 State Legal emissions certification

• Includes SUB-004 Accessport V3 (AP3-SUB-004)

• Includes SF Intake System + SF Airbox

• Composite intake body offers excellent heat rejection

• OEM-quality fit, finish, and installation hardware

• Improves throttle response, airflow, and overall driveability

• Provides safe, consistent gains using COBB OTS maps

• Ideal for beginners and daily-driven STIs

Technical Specs / Material Info

• Intake Material: High-temperature plastic composite

• Intake Type: Short-Ram + Cold-Air hybrid with sealed Airbox

• Filter Type: Pre-oiled, reusable cloth filter

• Emissions Status: 50-State Legal

• Included Tuning Device: COBB Accessport V3 SUB-004

Installation Info

• 100% bolt-on installation

• No cutting or permanent modification required

• Accessport allows instant ECU flashing and real-time monitoring

• Install time: 1–2 hours

• Use included OTS maps for proper performance and MAF scaling

Special Notes / Emissions Info

• 50-State Emissions Legal

• Designed for STI models only, not compatible with WRX

• Must be used with Accessport maps included in the SUB-004 map database