Aeromotive Billet Fuel Sample Valve 15631 - Aeromotive's Billet Fuel Sample Valve is designed to simplify installation and make fuel checks a snap! Packed with common sense features, it's simply the best sample valve on the market. Installs into any 1/8' NPT gauge port. Provides a duplicate 1/8' NPT port on the valve for installation of fuel pressure gauge or pressure sensor transducer. Sample port is equipped with stainless steel barb fitting for extension hose and rotates 360° for ease of installation and sampling. The 'dual action', spring loaded safety valve keeps the valve sealed when unlocked and rotates into a locked position for racing. When a fuel sample is required, rotate to the unlocked position, press for fuel sample and release, re-lock the valve and go race. Available as a 3/8'' Quick Connect Sample Valve Kit, P/N 17119. Fits most Ford Modular and GM LS Series Engines.