the hks gt ii wastegates are the latest in wastegate technology. they feature a lower body cast from stainless steel and an anodized purple upper case machined from billet aluminum. the gt ii wastegates weighs approximately 2/3s the weight of the original gt wastegate and are significantly smaller in height and width. their compact size combined with the gt iis v-band inlet and outlet flanges allows for versatile mounting in tight spaces. one of the most important components in a well designed turbocharged engine is a properly sized wastegate. too small of a wastegate can cause boost creep while too large of a wastegate will increase boost lag and decrease performance. our greddy external wastegates are made from the highest quality materials to insure both stability and durability in a turbocharger's boost control. each unit is adjustable as well as rebuildable. available in 4 sizes and various spring rates. from 0.8kg/cm2 (11psi) to 1.5kg/cm2 (21psi) and up.