Product Overview High-performance valve spring retainers manufactured from 4130 Chromoly Steel. Precision-machined for perfect fitment with STK valve spring kits. Lightweight design reduces valvetrain mass for improved high-RPM performance. What’s Included Chromoly valve spring retainers for Toyota 20v engines Material Specifications Material: 4130 Chromoly Valve Stem Size: 6mm Finish: Precision-machined Key Benefits Lightweight with exceptional strength Reduced mass versus typical OE stamped steel Improved valvetrain stability at high RPM Long-term durability under extreme load Application Designed for Toyota 20v engines. Compatible with STK valve spring kits. Installation Notes Professional installation recommended. Ensure correct valve stem size compatibility.
