Skunk2 Alpha Series Stainless Steel Exhaust Header for Honda K24Z7 (2012–2015 Civic Si, 2013–2015 ILX)

Description

• 3″ Outlet Design
• Drastically Improves Mid-Range Power
• Cast T-304 Stainless Steel Construction
• Fits 9th Gen Civic Si and Acura ILX

• Description
• Vehicle Fitment
• Technical Data
• Included

• Skunk2 Alpha Series Header for 12-15 Civic Si/13-15 ILX

  Transform the way your K-series breathes with the Skunk2 Alpha Series Header for 12-15 Civic Si/13-15 ILX. Born from the same R-type engineering that powers record-setting Skunk2 race cars, this one-piece stainless masterpiece unlocks noticeable horsepower, sharper throttle response, and that unmistakable VTEC growl—without sacrificing OEM fit or daily-driver reliability.

  Why it hits harder than stock

  • Race-bred 4″ cast bellmouth merges exhaust pulses into a turbulence-free 3″ outlet, freeing up exhaust flow the factory manifold strangles.
  • CNC-mandrel-bent T-304 stainless primaries shrug off heat, corrosion, and road salt for years of spirited pulls.
  • Beefy ½” laser-cut flanges stay flat and sealed under repeated heat cycles—no more pesky gasket leaks.
  • Integrated flex section absorbs engine movement, protecting welds and downstream piping.
  • Dual O2 bungs in factory locations (plus an included defouler) keep the ECU happy and MIL lights off.*
  • Direct bolt-on to the OEM cat-back; no cutting, no hacking, just pure performance.

  Track-minded construction

  • One-piece, cat-delete design eliminates an exhaust restriction worth double-digit wheel horsepower on naturally aspirated K24Z engines.
  • CAD-modeled runner lengths and merge collector geometry equalize exhaust pulse timing for a broader, smoother powerband—ideal for both autocross launches and highway pulls.
  • Engineered and dyno-validated in California by Skunk2 Racing, a brand trusted by championship-winning Honda teams worldwide.

  Fitment

  • 2012-2015 Honda Civic Si (FG/FB)
  • 2013-2015 Acura ILX 2.4L (DE)
  • (Also bolts up to later 2016-2017 ILX 2.4L chassis using the same K24 powertrain.)

  Installation Snapshot:

  Intermediate skill • 1–2 hrs • New gasket, O2 defouler & mounting hardware included • No cutting/tune required (ECU retune recommended for max gains).

• 2013-2015 Acura ILX2012-2015 Honda Civic Si
• Cast Stainless Steel Construction4″ Bell Mouth Top Opening3″ Exhaust Opening1/2″ Thick Flange
• (1) Downpipe(3) Bolts(3) Nuts(1) O2 Defouler

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