Abstract: A torsion-enhancing apparatus has a mounting bracket, a vacuum bracket and two air filters. The mounting bracket has a threaded hole, a first connecting tube and two ventilating holes. The threaded hole is formed in the front end and the first connecting tube is connected to the rear end of the mounting bracket. The vacuum bracket is connected to the mounting bracket, and has a rear cap, a front cap, a diaphragm, a spring and a pressing disk. The rear cap is connected to the front end of the mounting bracket. The front cap is connected to the rear cap and has a third connecting tube, an adjusting bolt and a sealing ring. The diaphragm is mounted between the caps. The spring is mounted in the caps between the adjusting bolt and the diaphragm. The air filters are connected to the second connecting tubes of the mounting bracket.