COBB Stage 1 Power Package – 2022-2026 Honda Civic Si

Cobb Stage 1 Power Package — 2022-2026 Honda Civic Si

The Cobb Stage 1 Power Package for the 2022-2026 Honda Civic Si combines the Cobb Accessport V3 with a high-flow drop-in air filter for the K20C2 1.5T platform. The Accessport V3 flashes Cobb’s OTS calibration to the factory ECU over OBD-II, and the high-flow filter improves airflow in the factory airbox — the two highest-return modifications available on the Civic Si while retaining all factory hardware.

DETAILS

• Includes: Cobb Accessport V3 + Cobb high-flow drop-in filter
• Platform: 2022-2026 Honda Civic Si K20C2 1.5T MT
• OTS maps: 91 octane, 93 octane — K20C2 specific
• Improved throttle response and torque delivery across the rev range
• High-flow filter: drop-in for factory airbox — no intake plumbing changes
• Accessport live gauges: boost, AFR, IAT, coolant temp, and more
• Accessport data logging for ProTuner custom calibration
• NOTE: Ships via UPS/FedEx — signature required at delivery

K20C2 Factory Calibration and What Stage 1 Recovers

The K20C2 1.5T in the 2022-2026 Civic Si is a more sophisticated turbocharged four-cylinder than Honda’s earlier 1.5T applications — it produces more power, uses a more developed boost control strategy, and carries significant factory calibration conservatism for the same global market reasons all OEM turbo engines do. Honda tunes the Civic Si with margin for 87-octane fuel, varying altitude, and the full spectrum of ambient conditions a widely-sold vehicle must handle reliably. On quality 93 octane in consistent driving conditions, Cobb’s OTS maps for the K20C2 recover that margin: ignition timing advances to what quality fuel supports, boost targets move to what the stock turbo can produce cleanly, and fueling tightens to what the K20C2’s direct injection system can deliver precisely. Throttle response sharpens noticeably — from the light off-throttle inputs that characterize normal driving to the full-throttle pulls where the K20C2’s turbo is fully working.

Drop-In Filter, Live Gauges, and Diagnostic Capability

The high-flow drop-in filter improves airflow to the K20C2’s turbocharger without changing the factory intake routing or MAF sensor position. The OEM paper filter is replaced with a higher-flow element that draws air through the same factory cold-air path — no intake plumbing changes, no risk of unmetered air leaks, no change in intake noise character. The Accessport OTS map accounts for the filter’s airflow improvement — the calibration is validated for this Stage 1 hardware configuration rather than being a stock map with a filter change. The live gauge display on the Accessport shows boost, AFR, and IAT in real time, data the factory Civic Si instrument cluster never provides.

What’s in the Box

• Cobb Accessport V3
• OBD-II cable
• USB cable (to PC)
• 2 interchangeable Accessport faceplates
• Universal in-vehicle mount
• OTS maps — pre-loaded and ready to flash
• Cobb high-flow drop-in filter

Why Choose Cobb Tuning

Cobb Tuning has been developing performance software and hardware for turbocharged enthusiast vehicles since 1999. Founded in Austin, Texas, Cobb built its reputation on the Accessport and expanded into a full catalog of hardware engineered to complement it. Every OTS map is developed in-house on real vehicles, and every hardware product is validated as part of a complete system — not sourced and sold in isolation. That integrated approach is why Cobb produces consistent, reliable results across the builds we see every day.

The RallySport Take

The Civic Si is a well-engineered performance-oriented compact that Honda calibrates conservatively from the factory. Stage 1 gives the K20C2 the calibration it deserves — one optimized for quality fuel and known conditions rather than the lowest-common-denominator global market tune. The Accessport also serves as a full OBD-II code reader, giving Civic Si owners diagnostic capability alongside the tuning function.

Fitment

Year	Make	Model	Notes
2022-2026	Honda	Civic Si	K20C2 1.5T MT