Heavy Duty Replacement Cush Drive damper sets. These provide improved performance, greater durability and will outlast the stock OEM rubber and is much stronger. They will reduce your reaction time at the drag strip. Whether you are drag racing a High Horsepower bike, cruising the street, or if you are a daily driver you will benefit from this product. By changing the compound they hold their shape over time and resist the abuse of modern day motorcycles. They are Made In The USA!