Product Overview
High-performance forged valve manufactured from 21-4N Stainless Steel. One-piece forged construction for exceptional strength and durability. CNC machined and heat-treated for consistency. Precision stem finish for low friction, hardened tips to resist wear.
Engine Applications
Fits: Golf Mk4 GTI · Audi A3 8L · Audi A4 B5 / B6 · Audi TT 8N · Seat Leon · Skoda Octavia · Passat B5
Engine codes
NA — ADR, APT, ARG, AGN, AFY, AVC, ARH
Turbo — AEB, AGU, AJH, AJL, AJQ, AMB, AMK, AMU, APH, APX, APY, AQX, AUM, AUQ, AWP, AWD, AWW, AWM, AWT, ARY, ARX, ARZ, AVJ, BAM, BEA, BEX, BFB, BJX, BBU, BKV, CFMA
What’s Included
- 8 × Exhaust Valves — 30x6x115mm
Material Specifications
Material: 21-4N Stainless Steel forged valve
Temperature Rating: Above 540°C (1000°F)
Features: Undercut stems and back-cut heads for enhanced airflow
Key Benefits
Reduced valve mass for quicker engine response
Improved flow characteristics for maximum power
Heat and pressure resistance for extreme combustion conditions
Long-term durability in high-performance applications
Installation Notes
Professional installation recommended. Correct spring heights and valve travel must be verified to avoid coil bind. For camshaft installations, always check piston-to-valve clearance and verify spring installed height. Use high-zinc break-in oil on first start.
This component forms part of the valve train system and must be selected to suit the intended engine configuration, RPM range, and camshaft design.
