High-Flow Aluminum Cold Air Intake for 2002-2005 Honda Civic Si (EM2)

🏁 Your K-Series. Finally Breathing.

The 2002-2005 Civic Si already makes the best Honda engine of the era. The K20A2 and K20A3 are legendary — but they're choking on a factory airbox that was designed for emissions compliance, not performance.

Flashark's cold air intake frees your K-Series from that restriction:

→ +8-15 wheel horsepower (dyno-verified)
→ Sharper throttle response — VTEC hits harder
→ Increased induction note at high RPM
→ No CEL — precision MAF calibration
→ Direct bolt-on in 90 minutes

The K-Series was built for this upgrade. Flashark just gives it the air it deserves.

BEFORE YOU BUY — READ THIS

• Stock ECU / No tune: ✅ Fully compatible
  (MAF housing calibrated for K20A2/A3)

• With bolt-ons (header, exhaust, pulley): ✅
  Gains stack with your existing mods

• With Hondata/K-Pro tune: ✅
  Our intake works perfectly with reflashed ECUs

• CARB compliance:
  ⚠️  2002-2005 Civic Si not CARB-exempt (off-road / track use only — not for street use in CA, NY, and other CARB states)

Technical Specifications

System Type: Cold Air Intake (CAI)

Tubing Material: 6061-T6 Aluminum

Tubing Finish: Polished / Black Powder Coat

Tube Diameter: 76mm (3.0") — large bore throughout (no reducer) matches K-Series throttle body

Air Filter: High-Flow Dry Air Filter (washable & reusable)

Filter Size: 4.5" diameter cone filter with integrated velocity stack

Heat Shield: Included tucks behind the inner fender, pulls cold air from the wheel well

MAF Housing: CNC-machined 76mm aluminum precise bore = no CEL on K-Series

Couplers: Multi-ply silicone high-temp rated for turbo-style heat

Clamps: Stainless steel T-bolt (all hardware)

Intake Temp:  Average 15-25°F cooler than ambient engine bay temps

Installation: 100% Bolt-On, No welding, no drilling

Hardware: All included (exact OEM replacement)

Why Flashark? 5 Reasons

1️⃣  K-SERIES OPTIMIZED — NO CEL

The K20A2/A3 is a high-revving VTEC engine that demands precise airflow measurement. Flashark's MAF housing is CNC-machined to exact 76mm tolerances — your factory ECU reads airflow perfectly without drama.

→ No check engine light
→ No reflash needed
→ VTEC engages cleanly every time

2️⃣  ALUMINUM TUBING vs. FACTORY PLASTIC BOX

The factory intake box is molded from plastic, absorbing engine bay heat and restricting airflow through sharp bends and internal baffles.

Flashark uses mandrel-bent 6061-T6 aluminum:
• Smoother airflow path (no turbulence)
• Rapid heat dissipation
• Won't crack or degrade over time
• Sounds incredible under VTEC pull

3️⃣ COLD AIR INTAKE — NOT HOT AIR INTAKE

Position matters. Flashark's heat shield tucks behind the inner fender liner, pulling cold air from the wheel well — the coldest spot in the engine bay.

This is the difference between a cold air intake and a hot air intake that just sounds cool.

4️⃣  BOLT-ON IN 90 MINUTES — NO MODIFICATIONS

Designed specifically for the EM2 chassis. No cutting, no drilling, no custom fabrication.
Tools needed: Basic hand tools (ratchet, 10mm/12mm sockets, screwdrivers). Estimated time: 90 minutes

Quality Guarantee Warranty

✅ CNC-Machined MAF Housing (no CEL, K-Series optimized)

✅ 6061-T6 Mandrel-Bent Aluminum (superior to the factory plastic box)

✅ Heat Shield Included (cold air from wheel well, not engine bay)

✅ High-Flow Cotton Oiled Filter (washable — lasts the life of your Si)

✅ Direct Bolt-On — No Modifications (OEM replacement, EM2-specific)

✅ All Hardware & T-Bolt Clamps Included

✅ Free US Shipping

WARRANTY RETURNS

🔧 2-Year Manufacturer's Warranty (defects in material and workmanship)

↩️ 30-Day Return Window (uninstalled items — see returns page)

💬 US-Based Technical Support Mon-Fri 9 AM-6 PM EST support@flasharkracing.com

Not sure if it fits your build?
Email us BEFORE ordering — we'll verify compatibility for your specific setup.