THIS IS THE BEST BOOST SWITCH ON THE MARKET. IT'S VERY RELIABLE AND ACCURATE. DEVIL'S OWN USES THIS EXACT SWITCH ON SOME OF THEIR METHANOL INJECTION KITS. IT IS ADJUSTABLE FROM 6-30PSI. IT CAN BE USED TO TURN ON METHANOL, EXTRA INJECTOR, OR NOS. AND IT CAN BE USED AS A FUEL OR BOOST CUT. IT COMES WITH A BRASS NIPPLE, 18G WIRE, CONVELUTED TUBING, VACUUM TEE, HIGH QUALITY GATES HOSE, AND THE NECESSARY CONNECTORS TO COMPLETE AN INSTALLATION. $23.99 SHIPPED IN THE US. PAYPAL