GSC 3145-12 Exh 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)
• Toyota 2JZ-GTE VVT-i engine applications using 12 exhaust valve guides, where cylinder head compatibility is confirmed
• Engine-based 2JZ applications widely cross-listed by trusted retailers include 1993-1998 Supra NA/TT, 1992-2000 Lexus SC300/Toyota Soarer, 2001-2005 Lexus IS300, and 1991-2005 Lexus GS300/Toyota Aristo, but those should be published only when the specific 2JZ cylinder-head guide compatibility is manually confirmed
• Position: Exhaust side
• Set of 12 standard-size stopper-style guides
• Primary confirmed engine fitment: Toyota 2JZ / 2JZ-GTE and 2JZ-GTE VVT-i
• Drivetrain varies by application: RWD on listed Supra fitment; other cross-listed platforms may differ by market
• Fitment confirmed through 1998 Supra TT. 1999-2025 vehicle-level coverage unconfirmed at time of listing.

Features

• GSC Power-Division manganese bronze exhaust valve guide set
• Standard-size stopper-style guide design
• Designed for Toyota 2JZ cylinder head service
• Confirmed by trusted sources for 2JZ-GTE and 2JZ-GTE VVT-i applications
• Sold as a complete set of 12 guides
• Manganese bronze construction for durability and heat resistance
• Intended for performance rebuilds and cylinder head preparation
• Precision-machined for proper guide fitment
• Engine-specific internal valvetrain component
• Suitable for machine-shop installation during head service

Specifications

• Part Number: 3145-12
• Brand: GSC Power-Division
• Product Type: Exhaust valve guide set
• Position: Exhaust
• Quantity: 12
• Size: Standard size
• Style: Stopper style
• Material: Manganese bronze
• Engine Compatibility: Toyota 2JZ / 2JZ-GTE / 2JZ-GTE VVT-i
• Installation Note: Cylinder head machine work and guide fitting required

Included Components

• 12x exhaust valve guides

Product Description

The GSC 3145-12 is a standard-size stopper-style manganese bronze exhaust valve guide set for Toyota 2JZ cylinder head builds. Trusted performance retailers consistently identify this part number as a set of 12 exhaust valve guides for Toyota 2JZ applications, with one stronger source specifically naming 2JZ-GTE and 2JZ-GTE VVT-i compatibility. That makes this an engine-side valvetrain service component that should be assigned by confirmed cylinder head compatibility rather than by vehicle pattern matching alone. 

The set uses manganese bronze construction and a stopper-style guide design for exhaust-side cylinder head service. It is intended for performance engine rebuilds, machine-shop head preparation, and valvetrain restoration where precise guide installation is required. Additional retailer cross-listing shows broad 2JZ vehicle associations including Supra, SC300/Soarer, IS300, and GS300/Aristo platforms, but those listings appear to be engine-family based and should be treated as secondary until the exact head compatibility is confirmed for the target vehicle.

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 cylinder head machining and valve-guide fitting procedures. Fitment confirmed through 1998 for Supra Twin Turbo as a primary vehicle-level application; broader 1999-2025 vehicle-level coverage remains unconfirmed at time of listing.