Protect your truck with the technology high power diesel OEMs use. A Fluidampr Performance diesel damper provides premium, broad range control of destructive crankshaft torsional vibration for optimum performance and durability. Install as an upgrade to OEM elastomer style harmonic balancer, when horsepower is gained, or when rotating assembly parts change to reduce wear on critical internal engine components. Features high quality, long lasting viscous silicone with precision CNC machined and computer balanced high-grade steel components. No tuning or maintenance required. SFI 18.1 approved. Official damper of DIESEL Motorsports. Made in the USA.