Chevy Small Block Gen 1, Buick, Pontiac (283-350 V8, 194-292 I6, 90deg V6)Engine Harmonic BalancerGreat value for non-SFI required applications. A Streetdampr by Fluidampr 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 damper technology with precision CNC machined and computer balanced steel components. No tuning or maintenance required. NOT SFI APPROVED. Made in the USA.Harmonic BalancerHarmonic Balancer - Streetdampr - Internal Balance - Steel - Natural - Not SFI Approved - 6-7/8 in O.D. - Small Block Chevy - EachHarmonic Balancer - Streetdampr - Small Block Chevy - Eachharmonic, Balancer, balancer, streetdamprStreetdampr (Non-SFI) by Fluidampr