Syncronic 50mm waste gate

50mm Syncronic waste gate , includes flanges, 2 springs ,and 2 valve seats 50mm, and a 40mm which in turn lets you have 2 different size waste gates for the price of 1 ! The Synapses Syncronic waste gate is perfect for high boost aps because boost holds it shut , and they also are the first waste gates that do not use a diaphragm system so reliability is excelent ,this is the waste gate we use on all of our Competition twin kits . here is a good article on this waste gate . http://www.turbomagazine.com/tech/0705_turp_synchronic_wastegate/index.html