Pacaloy 1.645 Triple Valve Springs Pacaloy is steel that offers outstanding cleanliness, extreme tensile strength, zero wear, and light weight designs. The Howards/PAC engineering team designs and maintains the manufacturing process for professional racers who see extreme amounts of wear in severe racing applications. Consistent run after run, lap after lap. Specifically designed to last under the toughest racing environments, including Drag Race, Oval Track and Endurance applications. Fully tested to rev higher, live longer and run harder.