Honda 400EX / XR400R Race-Ported Head – +1mm Valves, Complete
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Honda 400EX / XR400R Race-Ported Head – +1mm Valves, Complete

$1,200.00
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🔥 Race-Ported Cylinder Head Assembly – Honda TRX400EX / 400X / XR400RComplete, Fully Assembled | +1mm Valves | Machined & Ready to Perform Give your Honda 400EX or XR400R the airflow and durability it deserves. This fully built, race-ported cylinder head is designed for riders pushing their machines hard — whether on the dunes, trails, or the track. Includes +1mm oversized stainless valves and all new internals. ✅ Fits all years of TRX400EX, TRX400X, and XR400R✅ No head or cylinder modifications required to install✅ Includes all new hardware – completely assembled✅ Allow 4–6 weeks for precision machining & assembly 📦 What’s Included: 🧱 New Aftermarket Cylinder Head + Valve Cover 🛠️ Full Race Port and Polish 🔧 Valve Guides Cut & Pocket Ported for +1mm Valves ⚙️ Kibblewhite +1mm Black Diamond Intake & Exhaust Valves 🔩 Kibblewhite Performance Valve Spring Kit 🛡️ Kibblewhite Viton Valve Stem Seals 🔁 Rocker Arms + Rocker Shafts 🔩 Valve Keepers, Washers,

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