Jet Tek Performance has finally developed our very own titanium retainers. After years of using others' overpriced items, our customers have had enough. Finally a quality retainer with the same weight savings at half the price! We run these sets in stage 1 to stage 6 builds. VERY IMPORTANT IF YOU PLAN ON RUNNING OVER 8600 RPM! They hold the valve keepers in tight with 4x the clamping force that of an OEM retainer. They are also 5 grams lighter than the OEM design.