This Dampened Crank Pulley is a great option for those looking to replace the stock piece. The stock pulley can’t handle high horsepower and tends to separate at the rubber which can lead to great damage to surrounding accessories and to the body of the vehicle when it fails. The Titan pulley is SFI approved and legal to go 10.99 and quicker. The pulley is great for street and racing use. We use these on all the street and race Supra's that we build. A must have for anybody who wants to avoid a costly separation of the stock pulley.