High-Performance Sodium Filled Inconel Exhaust Valves Valves for BMW B58B30

Supertech Engine Valves are engineered for high-performance street and racing applications, delivering exceptional strength, heat resistance, and precise fit. Production begins with a one-piece forging, where the head is formed under a slow two-step process to maintain optimal material grain flow. Each valve undergoes multiple CNC machining steps, stress-relieving heat treatments, and either nitride hardening or application-specific coatings. Final grinding and our patented Superfinishing process ...

With over 30 years of racing valve development, Supertech combines this deep experience with state-of-the-art manufacturing and testing technology including ultrasonic inspection, x-rays, laser measurement, and Finite Element Analysis (FEA). In collaboration with top engine builders, we conduct continuous testing to refine every valve for high flow, extreme durability, and world-class performance.

This valve features a Single Groove lock groove, a Dished face profile, and measures Standard in diameter, with an overall length of 100.10mm. Built to precise standards, it ensures optimized airflow and long-term reliability.

Features

• Single Groove lock groove design for secure valve retention
• Standard valve diameter for optimal flow characteristics
• Dished face style improves combustion efficiency
• 100.10mm total valve length ensures proper fit and seating
• High-performance materials for strength, fatigue resistance, and thermal stability

Benefits

• Improved airflow and volumetric efficiency
• Consistent performance under high boost and RPM
• Reduced wear and extended valve train life
• Ideal for naturally aspirated, turbocharged, or nitrous applications

Specs

• Length: 100.1mm
• Groove Type: single groove
• Stem Diameter: 5.95mm
• Head Diameter: 28.5mm(std)
• Material: inconel-nimonic / sodium filled

Engines

• BMW B38B15
• BMW B48
• BMW B58B30
• Mini B38
• Mini B48

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