Supertech Performance BMEVI-1055S-HS-12 Sodium Filled Inconel Exhaust Valves BMW N55 S55

These valves are designed to deliver exceptional durability and performance under the most demanding conditions, making them ideal for high-performance and racing applications.

Key Features:

• Sodium filled Inconel-Nimonic construction significantly reduces operating temperatures for enhanced valve life
• Standard OEM diameter: 28mm head diameter ensures direct installation compatibility
• 5.96mm stem diameter with single groove keeper design
• Overall length: 112.9mm
• One-piece forging with controlled grain flow for maximum strength
• CNC machined to strict dimensional tolerances for optimal sealing
• Black nitride finish with patented Superfinish stem treatment reduces friction and wear
• Must be used with single groove keeper KPR-6S-7 (sold separately)

Supertech racing valves begin with a precision one-piece forging process that maintains optimal material grain flow. Each valve undergoes multiple CNC machining steps, heat treatment for stress relieving, nitride hardening, and final grinding followed by Supertech's proprietary Superfinishing process. This comprehensive manufacturing approach ensures industry-leading performance, durability, and dimensional precision.

Compatible with BMW models equipped with N55B30 or S55B30 engines including E90, E91, E92, E93, E82, E88, E89, F80 M3, F82/F83 M4, F87 M2 Competition, X6, Z4, and F01 series vehicles.