They work in tandem with your AEM fuel pressure regulator to smooth out the pressure pulsations caused by the injectors opening and closing as well as the fuel pump operation under load.

• Engineered to stabilize pressure pulsations caused by the injectors opening, ideal for applications with large fuel injectors and high volume fuel pumps
• 1/8" NPT port on body of damper/regulators and in-line dampers for easy installation of mechanical pressure gauge or pressure transducer
• Compatible with any fuel -- full anodized billet aluminum construction with stainless steel springs and fluorosilicone diaphragm
• Fittings included for damper/regulator’s and direct mount dampers