The XDP Performance Balancer Series - Diesel Performance Harmonic Balancer XD723 is an ideal upgrade for your high-performance GM 6.6L Duramax LBZ/LMM. High-performance diesel engines require a high-performance balancer. Upgrading the harmonic balancer (also known as a crankshaft vibration damper) when you increase your engine's power output is vital for prolonged engine life. A performance balancer can be essential for engines with increased horsepower, torque, or RPM, as they are better designed to handle more extreme torsional vibrations and help prevent potential engine damage. The Performance Balancer Series from XDP are designed to withstand the demands of modified diesel engines. Constructed with a Billet Steel Ring and Hub, the XDP Performance Balancers use an ultra-reliable pressure-bonded technology to bond the steel hub to the steel inertia ring. These balancers are engineered to meet SFI 18.1 specifications and are approved for race use. In addition, the balancers are dynamically balanced for smooth operation. Features: Billet Steel Ring And Hub ConstructionEngineered To Meet SFI 18.1 StandardsPressure Bonded Technology To Ensure Secure Fit Of Inertia RingXD723 Harmonic Balancer Specifications: Overall OD (in): 7.796Nose OD (in): 0Overall Width (in): 2.707Crank Bore (in): 1.930Ring Width (in): 2.619Bolt Holes: 0Counterweight Balance: Hub weightedNo. of Integrated Pulleys: 1Pulley Type 1: SerpentinePulley Grooves 1: 6Pulley OD 1 (in): 7.560Crank Trigger/Exciter Plate: No