Brian Crower BC3933 Exhaust Valve Guides 6.0mm Set of 12 for Toyota 7MGTE 7MGE

Vehicle Fitment

• 1986-1992 Toyota Supra MkIII (A70, 7MGTE 3.0L Turbo I6 & 7MGE 3.0L NA I6)
• 1989-1992 Toyota Cressida (MX83, 7MGE 3.0L NA I6)

Fitment Notes

• Exhaust valve guides only - covers all 12 exhaust valves on the 24-valve DOHC 7M cylinder head. Intake guides sold separately as BC3932.
• Valve guides may require honing to final size after installation; professional cylinder head machining is required.
• Fully compatible with Brian Crower stainless steel valve lineup for the 7MGTE/GE platform.

Features

• Machined from manganese silicon aluminum bronze alloy for superior thermal conductivity, corrosion resistance, and reduced valve stem friction versus OEM cast iron guides.
• CNC machined to exacting tolerances for precise valve-to-guide fit, ensuring consistent sealing and long-term valvetrain reliability on the exhaust side.
• Engineered to withstand the elevated heat loads of exhaust valve operation, particularly critical under forced induction and high-RPM conditions.
• Resistant to cracking and corrosion under sustained thermal and mechanical stress common to high-boost 7MGTE applications.
• Maintains consistent lubrication along the valve stem at elevated engine temperatures, reducing long-term wear on both the guide and valve.
• 100% compatible with Brian Crower's stainless steel valve lineup for the 7MGTE/GE head, enabling a complete BC valvetrain build.

Specifications

• Part Number: BC3933
• Application: Toyota 7MGTE / 7MGE 3.0L DOHC I6
• Position: Exhaust
• Valve Stem Diameter: 6.0mm
• Material: Manganese Silicon Aluminum Bronze Alloy
• Quantity: Set of 12 (full exhaust side)

Included Components

• 12x Manganese Silicon Aluminum Bronze Exhaust Valve Guides (6.0mm)

Product Description

The Brian Crower BC3933 exhaust valve guides are the exhaust-side complement to the BC3932 intake guides, together forming a complete valve guide set for the Toyota 7MGTE and 7MGE 3.0L DOHC inline-six. Cast from manganese silicon aluminum bronze alloy, these guides manage the extreme heat loads inherent to exhaust valve operation - a demanding environment that accelerates wear in OEM cast iron guides, particularly on boosted 7MGTE builds. Superior thermal conductivity draws heat away from the exhaust valve stem more efficiently, while the bronze alloy's lubricity reduces friction and stem wear over time.

Each set includes all 12 exhaust-side guides for the 24-valve 7M head and is CNC machined for consistent press-fit tolerances into factory guide bores. Professional installation and post-install honing to final stem clearance are required. For a complete valvetrain rebuild, BC3933 pairs directly with BC3932 intake guides and the full Brian Crower stainless steel valve lineup for the 7M platform, covering both the 1986-1992 Supra MkIII and 1989-1992 Cressida.