Streetdampr by Fluidampr. Modifications can compromise your stock harmonic balancer. Install a value priced Streetdampr by Fluidampr early for durability. Superior viscous damper design controls harmful torsional vibration across the entire rpm range. Reduce wear on engine components. Reduce risk of crankshaft failure. Improve timing. Unleash lost torque and horsepower. Precision CNC machined and balanced high - grade steel components. Features engraved timing marks and ready to paint raw finish. No maintenance required. Trusted by leading engine builders worldwide. Non - SFI approval. Made in USA.