Brian Crower Oversized Stainless Steel Intake Valves for Toyota 1JZ (+1 mm) (BC3312)

When building a high-performance 1JZ engine, increasing intake airflow is one of the most effective ways to improve cylinder filling and unlock additional horsepower. The Brian Crower Oversized Stainless Steel Intake Valves are engineered to provide exceptional durability, reduced valvetrain mass, and enhanced airflow for demanding street and motorsport applications.

Featuring a +1 mm oversized head diameter, these valves increase intake flow capacity compared to standard-size valves, making them ideal for ported cylinder heads and fully developed high-horsepower engine builds. Manufactured from premium heat-resistant stainless steel, each valve utilizes a one-piece construction with a friction-welded Stellite tip for superior wear resistance and long-term reliability.

The undercut stem design reduces overall valve weight while improving airflow into the combustion chamber, supporting extended RPM capability and increased engine efficiency. Fully machined and swirl-polished beneath the valve head, these valves deliver the precision and quality required for serious naturally aspirated and turbocharged 1JZ applications.

Supplied as a complete set of 12, these oversized intake valves are an ideal upgrade when paired with aftermarket camshafts, valve springs, and professionally ported cylinder heads.

Trusted by professional engine builders and motorsport teams worldwide, Brian Crower valves are a proven upgrade for unlocking the full potential of Toyota’s legendary 1JZ platform.

Carefully selected for builders who demand proven performance without compromise.

Why Upgrade Your Intake Valves?

Compared to factory intake valves:

✔ +1 mm oversized head increases intake airflow potential
✔ Premium stainless steel construction for superior heat resistance
✔ Friction-welded Stellite tips for excellent wear durability
✔ Undercut stems reduce weight and improve airflow
✔ Designed for high-boost and high-RPM applications

Key Features

✔ Genuine Brian Crower oversized stainless steel intake valve set
✔ One-piece valve construction
✔ Friction-welded Stellite tips
✔ Fully machined and swirl-polished under the valve head
✔ Dished intake valve design
✔ Complete set of 12 valves

Technical Specifications

✔ Brand: Brian Crower
✔ Part Number: BC3312
✔ Product Type: Oversized Intake Valve Set
✔ Valve Material: Heat-Resistant Stainless Steel
✔ Valve Type: Intake / Dished
✔ Valve Size: +1.0 mm Oversized
✔ Head Diameter: 33.0 mm
✔ Stem Diameter: 5.98 mm
✔ Overall Length: 97.6 mm
✔ Quantity: Set of 12 Valves
✔ Engine Family: Toyota JZ-Series

Compatible Engines

✔ 1JZ-GE
✔ 1JZ-GTE

Shipping

🇪🇺 EU Delivery: 5–10 Business Days
🌍 International Delivery: 7–21 Business Days