GSC 3031-12 Exhaust Valve Guides for 93-98 Supra TT/2JZ-GTE

Vehicle Fitment

• 1993-1998 Toyota Supra Twin Turbo (JZA80, 2JZ-GTE 3.0L Turbo I6, RWD)
• Fits Toyota 2JZ-GTE cylinder head applications using 12 exhaust valve guides
• Confirmed for Supra Twin Turbo by trusted retailer fitment data
• Part is engine-specific to 2JZ-GTE exhaust-side cylinder head service, not a universal vehicle part
• Not confirmed for naturally aspirated 2JZ-GE applications by the strongest source set used here
• Not confirmed for VVT-i 2JZ-GTE Aristo/other market variants from official GSC source material in the sources reviewed
• RWD application confirmed for listed Supra fitment
• Fitment confirmed through 1998 Supra Twin Turbo. 1999-2025 coverage unconfirmed at time of listing.

Features

• GSC Power-Division exhaust valve guide set
• Designed for Toyota 2JZ-GTE cylinder heads
• Standard-size exhaust valve guides
• Sold as a complete set of 12
• Manufactured from true C67410 manganese bronze
• CNC-turned on dedicated precision equipment
• Built to tight installation tolerances
• Shaped to support airflow rather than simply copying OEM guide geometry
• Intended to reduce fitting time during cylinder head preparation
• Suitable for performance rebuild and valvetrain service applications

Specifications

• Part Number: 3031-12
• Brand: GSC Power-Division
• Product Type: Exhaust valve guide set
• Engine Compatibility: Toyota 2JZ-GTE
• Position: Exhaust
• Quantity: 12
• Size: Standard size
• Material: C67410 manganese bronze
• Installation Note: Cylinder head machine work/guide installation required
• Application Type: Engine/cylinder head specific

Included Components

• 12x exhaust valve guides
• 1x depth gauge

Product Description

The GSC 3031-12 is an exhaust valve guide set for Toyota 2JZ-GTE cylinder head builds. The strongest source match identifies it specifically as a standard-size set of 12 exhaust valve guides for the 2JZ-GTE, with confirmed vehicle-level fitment on the 1993-1998 Toyota Supra Twin Turbo. This is an engine-side valvetrain service component, so fitment should be tied to the correct 2JZ-GTE cylinder head rather than broadly assigned across all 2JZ-powered vehicles.

GSC describes these guides as being made from true C67410 manganese bronze and CNC-turned to tight tolerances for easier installation and better quality control. GSC also states the guides are shaped to help airflow instead of simply duplicating the OEM design. The set is sold as 12 exhaust guides and includes a depth gauge, making it suitable for machine-shop cylinder head service, performance rebuilds, and upgraded valvetrain assemblies.

This product does not change vehicle ride height, so no front or rear lift/drop height applies. Because this is an internal engine component, installation should be performed with proper guide fitting and cylinder head machining practices. Fitment confirmed through 1998 Supra Twin Turbo. 1999-2025 coverage unconfirmed at time of listing.