Timbren kit DR2500CA has an overall height of approximately 7-3/4 inches. The Timbren Spring is about 5 inches tall, the optional spacer is 1 inch and the bracket is approximately 1-3/4 inches tall. So, Timbren Kit DR2500CA is either 6-3/4 inches tall without the spacer or 7-3/4 with the optional Timbren spacer.