Inside 5 Professional CNC Ported K Heads (Port Sizes, Flow & Power Goals)

In this video, I unbox FIVE different CNC-ported K-Series cylinder heads from 4Piston Performance and break down exactly what each one is designed for. Not all ported heads are the same — and choosing the wrong one can leave horsepower on the table. Whether you’re building a street K24, a high-revving K20, or an all-out race setup, the port design, valve job, chamber work, and airflow characteristics matter more than most people realize. I go over: • The differences between each CNC port program • Which heads are best for street vs race builds • How port size affects velocity and powerband • Camshaft pairing and RPM range • Turbo vs NA head selection • Real-world horsepower goals for each setup If you’re planning a K-series build, this guide will help you match the right head to your power goals instead of guessing. This is the kind of tech that separates a basic build from a serious one. 👇 Drop your combo in the comments — K20 or K24? Boost or all-motor? ⸻ #KSeries #HondaBuild #4Piston #EngineBuilding #CNCHead #PerformanceParts #KSwap #HondaTech #Horsepower 🏁 Follow my builds & shop: 👉 https://battlebornspeedshop.com — OEM + performance parts for Honda & Acura 👉 Instagram: @diymike | @battlebornspeedshop 👉 Subscribe for more Honda performance content and build breakdowns! 🎥 Gear I Use: Camera: Canon R6 https://amzn.to/47CTxmv Mic: DJI Mic Mini https://amzn.to/43bx7r8 Editing: Final Cut Pro + Stream Deck Workflow https://amzn.to/3X7m12R Check Out Our eBay Store: https://www.ebay.com/str/racepartsnow Tracks Turtleneck -TrackTribe on the Flip - the grey room / density and time Not My First Rodeo - Dyalla Knockout - TrackTribe