Supertech GR Corolla Inconel Valves - Exhaust

Set of 6

Overview

Enhance the durability and performance of your GR Corolla G16E-GTS with this high-quality exhaust valve set from Supertech — engineered for demanding driving conditions, higher temperatures, and increased power applications.

The Supertech exhaust valves are a precision-engineered upgrade designed to replace your stock exhaust valves while offering improved heat management and long-term reliability — especially useful for performance builds and spirited driving.

Key Features

• High-Temperature Material: Made from premium Inconel-Nimonic alloy, a nickel-based superalloy known for exceptional resistance to high temperatures, corrosion, and thermal fatigue — ideal for exhaust side conditions in turbocharged engines.

• Sodium-Filled Stems: Each valve stem is filled with sodium to enhance internal heat transfer, significantly lowering valve head temperatures and improving thermal efficiency under load. This helps reduce wear and supports higher-performance use.

• Set of 6 Valves: Complete exhaust valve set for all cylinders in your engine.

• Direct Replacement: Drop-in replacement that requires no modifications to the factory head or valve train setup.

Specifications

• Valve Type: Exhaust

• Head Diameter: 32mm (standard size)

• Stem Diameter: 5.465mm

• Overall Length: 117.1mm

• Groove: Single groove design compatible with standard retainers and valve springs.

Performance Benefits

• Improved Heat Dissipation: Sodium filling allows for more efficient heat transfer from the valve head to the stem, helping keep temperatures down during high RPM or track use.

• Enhanced Durability: Inconel material stands up to continual high thermal stress and corrosion better than conventional steel valves, making them excellent for tuned engines or aggressive driving.

• Consistent Operation: Precision manufacturing ensures consistent dimensions and smooth operation, supporting reliable exhaust flow and valve timing.