BC3925 Valve Guide (6.6Mm Exhaust Nissan KA24DE)

🔧 Key Features

• 6.6mm Exhaust Valve Guide – Correct sizing for KA24DE exhaust valves
• OEM-Style Replacement Fitment – Direct replacement for factory guides
• High-Strength Material – Designed to handle high heat from exhaust flow
• Precision Machined – Ensures proper valve alignment and sealing
• Ideal for Engine Rebuilds – Stock refresh or performance builds

Brian Crower premium valves guides are made from manganese silicon aluminum bronze alloy and CNC machined to exacting tolerances. Brian Crower guides are resistant to cracking and corrosion, while reducing friction and insures high lubrication even at elevated engine temperatures and RPM’s. The perfect replacement to worn or damaged guides and 100% compatible with Brian Crower lineup of stainless steel valves.

🚗 Engine Compatibility

Nissan

• KA24DE 2.4L DOHC

(240SX, Altima, Frontier—the engine that refuses to die, even when abused.)

Brian Crower premium valves guides are made from manganese silicon aluminum bronze alloy and CNC machined to exacting tolerances

💡 Why Replace Valve Guides?

Valve guides wear out over time due to:

• Heat and friction
• High mileage
• Poor lubrication

Common symptoms:

• Excessive oil consumption
• Blue smoke from exhaust
• Valve play and poor sealing
• Loss of compression and power

Replacing them restores:

• Proper valve alignment
• Improved sealing and compression
• Reduced oil consumption
• Long-term engine reliability

⚙️ KA24DE Exhaust Valve Guide 6.6mm BC3925 – Installation Notes

• Requires machine shop installation (press-fit component)
• Must be reamed/honed to proper tolerance after install
• Best paired with new valves, seals, and a full head rebuild

Brian Crower guides are resistant to Cracking and corrosion, while reducing friction and insures high lubrication even at elevated engine temperatures and RPM’s
The perfect replacement to worn or damaged guides and 100% compatible with Brian Crower lineup of Stainless Steel valves

🏁 Bottom Line

If you’re rebuilding your KA24DE and ignoring valve guides, you’re cutting corners where it matters most.

The BC3925 exhaust valve guide ensures your valvetrain stays tight, sealed, and reliable—so your engine actually lasts after the rebuild.

Because doing it twice isn’t fun. Ask anyone who’s tried.