GSC Power-Division 3091-12 Manganese Bronze Exhaust Valve Guides for Toyota 1JZ

Vehicle Fitment

• 1991-2002 Toyota 1JZ-GTE/1JZ-GE engines (Exhaust side) - Supra, Soarer, Chaser, Mark II, etc.

Features

• High-strength manganese bronze exhaust valve guides
• Designed to resist high heat and wear in performance engines
• Precision CNC machining for tight tolerances and OEM-style fit
• Improves valve guide durability vs cast iron stock guides
• Complete set covers all 6 exhaust valve positions
• Direct replacement for OEM exhaust valve guides
• Ideal upgrade for high-RPM builds and turbocharged applications
• Professional installation recommended for best results

Specifications

• Part Number: 3091-12
• Guide Material: Manganese bronze for superior heat handling
• Quantity: Set of 12 exhaust valve guides
• Target Valve Stem Diameter: 6 mm (Toyota 1JZ cylinders)
• Length: ~1.72" (43.7 mm) typical for exhaust guides
• Installation Type: Press-fit into cylinder head exhaust ports

Included Components

• 12x Manganese bronze exhaust valve guides (full set)

Product Description

The GSC Power-Division 3091-12 exhaust valve guide set is engineered for performance and durability on Toyota 1JZ series engines - including both naturally aspirated (1JZ-GE) and turbocharged (1JZ-GTE) variants. Made from manganese bronze, these guides offer better thermal conductivity and wear resistance compared with typical cast iron OEM guides, helping maintain valve stability and reduce premature wear under high heat and high RPM use.

This complete set of 12 guides replaces all exhaust positions in the cylinder head for a thorough valvetrain refresh during engine rebuilds or performance upgrades. Direct OEM-style fitment means they're designed to press into the head with minimal machining, although professional installation with proper tools is recommended for best alignment and sealing. Whether renewing a high-mileage 1JZ engine or building a tuned street/track platform, these guides provide dependable performance where elevated heat and stress are common.