Brian Crower BC3303 30mm +1mm Exhaust Valves for 1991-2005 Supra/GS/IS/SC

Vehicle Fitment

• 1991-2005 Toyota Supra / Lexus GS300 / IS300 / SC300 (2JZ-GE, 2JZ-GE VVTi, 2JZ-GTE, 2JZ-GTE VVTi)

Features

• Premium single-piece exhaust valve with friction-welded Stellite tip
• Stainless steel construction for high-heat, high-RPM durability
• Undercut stem design reduces weight and improves airflow
• Swirl-polished valve head finish
• Oversized +1 mm head diameter (30 mm vs stock 29 mm)
• Set of 12 valves included (complete exhaust valve set for 6-cylinder)
• Precision CNC-machined to tight tolerances
• Compatible with both naturally aspirated and forced induction 2JZ engines

Specifications

• Head Diameter: 30.0 mm (+1 mm over OEM)
• Stem Diameter: ~5.97 mm
• Overall Length: ~99.1 mm
• Material: Heat-resistant stainless steel
• Type: Exhaust, dished face

Included Components

• 12x oversized exhaust valves (30 mm, +1 mm)

Product Description

The Brian Crower BC3303 30 mm +1 mm Exhaust Valves upgrade replaces the factory 29 mm exhaust valves in your 2JZ-powered Supra, GS300, IS300, or SC300, delivering improved airflow and enhanced durability. Featuring a single-piece stainless steel construction and a friction-welded Stellite tip, these valves are engineered for serious performance applications - including high RPM and forced induction setups.

The undercut stem and swirl-polished head reduce reciprocating mass and promote optimized flow dynamics, unlocking extra rev potential and more efficient exhaust scavenging. The +1 mm oversized head provides additional flow area, helping to relieve cylinder pressure more effectively.

This kit includes 12 valves, allowing for a full replacement of all exhaust ports in the 2JZ six-cylinder engine. Fitment is confirmed through 2005 models; beyond that, coverage is unconfirmed. Validated via multiple trusted sources including Rad Industries and C&C Motorsports. Perfect for high-output rebuilds, forced-induction builds, or any performance tuner seeking reliable, precision-matched valve upgrades.