Cold Air Intake for 2012-2015 Honda Civic Si / Acura ILX 2.4L

🏁 Your K24. Finally Breathing.

The 9th-gen Civic Si and the Acura ILX 2.4L share the same K24Z7 — Honda's most refined naturally aspirated four-cylinder of the era. 201 horsepower, a rev limit past 7,000 RPM, and Honda's legendary i-VTEC engagement.

But the factory airbox? It's throttling your K24 at the exact moment it wants to breathe hardest: top-end VTEC pull.

Flashark's cold air intake opens it up:
→ 76mm smooth-bore aluminum tubing — matched to the K24Z7 throttle body
→ Dry high-flow filter — more surface area, zero oiling maintenance
→ Intake air 15-20°F cooler vs. stock
→ VTEC engages harder and sounds better
→ No check engine light — no tune needed
→ Bolt-on in 90 minutes

The K24Z7 was built for this upgrade.

BEFORE YOU BUY — READ THIS

• Stock ECU / No tune: ✅ Fully compatible (MAF housing calibrated for K24Z7)

• With bolt-ons (header, exhaust, cam gears): ✅ Gains stack across all mods

• Acura ILX 2.4L owners: ✅ Fits your car (same K24Z7 engine and intake manifold)

• CARB compliance: Check product listing for CARB EO# before ordering if in CA, NY, or other CARB-regulated 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) matched to K24Z7 throttle body
Air Filter: High-Flow Dry Cotton (washable & reusable) No oil required — zero mess
Heat Shield: Included — shields filter from the engine bay pulling air from the fender well area
MAF Housing: CNC-machined 76mm aluminum precise bore = no CEL on K24Z7
Couplers: Multi-ply silicone (red/black) high-temp rated, burst-proof
Clamps: Stainless steel T-bolt (all hardware)
Installation: 100% Bolt-On, No welding, no drilling
Hardware: All included

Why Flashark? 5 Reasons

1️⃣  K24Z7 OPTIMIZED — NO CEL

The K24Z7 uses the same Honda MAF calibration family as the K20 series. Flashark's 76mm MAF housing is precision- machined to the exact bore your factory ECU expects.

→ No check engine light
→ No tune needed
→ VTEC engagement stays factory-smooth
→ i-VTEC map reads correctly at all RPMs

2️⃣  DRY FILTER — NO OILING HASSLE

Skip the re-oiling ritual.

Flashark's dry media filter:
• Wash and reuse — no re-oiling ever
• Better fine-particle filtration
• Zero risk of coating the MAF with oil
• Maintains airflow even when slightly dirty
• One filter = the life of your Civic/ILX

Maintenance: rinse every 15,000-20,000 mi, let dry fully, reinstall.

3️⃣  76mm TUBING — RIGHT-SIZED FOR K24

The K24Z7's throttle body and intake manifold are matched to a 76mm bore. Flashark's mandrel-bent aluminum tubing:
• Matches the K24Z7 throttle body exactly
• Smooth-bore throughout — no turbulence
• No reducer fittings that kill flow
• Rapid heat dissipation vs. plastic factory box

4️⃣  COLD AIR — FROM THE FENDER WELL

Position matters more than people think. Flashark's heat shield routes the intake to pull cool air from the front fender well area — the coldest zone in the engine bay on any Honda FB platform.

Denser, cooler air = more power. Especially on a naturally aspirated K24 that depends entirely on air density.

5️⃣  BOLT-ON IN 90 MINUTES

Designed specifically for the FB6 Civic Si and the Acura ILX 2.4L. Every bracket, mount, and clamp is an OEM-style replacement.

Tools needed: Basic hand tools (ratchet, 10mm/12mm sockets) Estimated time: 60-90 minutes