Brian Crower BC3924 Intake Valve Guides for 1989-1998 Nissan 240SX/KA24DE

Vehicle Fitment

• 1989-1998 Nissan 240SX KA24DE (all trims, FWD)
• 1991-1998 Nissan Silvia / 180SX KA24DE (all trims, RWD)

Features

• CNC-machined from **Manganese Silicon Aluminum Bronze** alloy
• 7.0mm intake valve stem diameter
• Designed to resist cracking and corrosion under heat stress
• Reduced friction for improved lubrication at high RPMs
• 100% compatible with Brian Crower stainless intake valves
• Set sold for full head guide replacement
• Suitable for performance rebuilds or restored OEM power
• Direct OEM fit in KA24DE heads

Specifications

• Material: Manganese Silicon Aluminum Bronze
• Guide Diameter (Intake Stem): 7.0mm
• Quantity: 8 valve guides (sufficient for 4 cylinders)
• Position: Intake valves only
• Compatibility: KA24DE 4-cylinder engine
• Installation: Cylinder head removal required; proper guide fit and lubrication essential

Included Components

• 8x BC3924 Intake Valve Guides

Product Description

The Brian Crower BC3924 Intake Valve Guides are engineered for KA24DE-powered Nissan vehicles, including 240SX and Silvia / 180SX models from 1989 through 1998. These guides are constructed from a premium manganese silicon aluminum bronze alloy to deliver excellent resistance to heat, cracking, and wear - key for performance or high-RPM usage.

Featuring a 7.0mm stem diameter, the guides are designed to fit intake valves and work seamlessly with Brian Crower stainless steel intake valves. The set includes 8 guides - enough to replace all intake guides in a KA24DE cylinder head. For best results, proper installation with precision toolwork is required. Fitment is confirmed through the 1998 model year; no verified sources yet confirm 1999-onward coverage. 2025 coverage unconfirmed.