TRX400EX / 400X Race Ported Cylinder Head – Complete Assembly

🔥 Complete Race Ported Cylinder Head – Honda TRX400EX / TRX400X
Fully Assembled | Bolt-On Power | Fits All Years & Models

Unlock the full potential of your Honda 400EX or 400X with this complete race-ported cylinder head assembly. Designed for both stock and built motors, this head delivers maximum airflow, efficiency, and durability right out of the box.

✅ Fits all years and models of Honda TRX400EX & TRX400X (1999–2014)
✅ Fully assembled and ready to install
✅ No cylinder modifications required

📦 What’s Included:

• 🧱 New Aftermarket Cylinder Head – With valve cover installed

• ⚙️ Full Race Port & Polish – Optimized for performance and airflow

• 🔩 Kibblewhite Stainless Steel Intake & Exhaust Valves

• 🔧 Kibblewhite Valve Springs

• 🧰 OEM Retainers & Valve Base Washers

• 🛡️ Valve Stem Seals + Keepers

• 🔁 Rocker Arms + Shafts

• 🧵 Top End Gasket Kit

• 🔒 Head Stud Kit

• 🎁 Stickers Included

⚙️ Key Features:

• ✔️ Ready to Run: No assembly required — all valvetrain parts pre-installed

• ✔️ Race-Bred Performance: Ported for max flow, torque, and throttle response

• ✔️ Built to Last: Stainless valves + Kibblewhite springs = reliable top end

• ✔️ Drop-In Fitment: Works with stock or big bore cylinders

• 🛠️ No Machining Needed – Direct bolt-on replacement

✅ Fitment Compatibility:

📦 Shipping Time:

Ships within 4-6 Weeks. (Assembly & Machine work Required) Tracking provided upon shipment.

💬 Customer Support:

Available Monday–Friday, 7 AM to 4 PM PST
24/7 live store chat available