High-temp NiCrFe-based alloy is used for valve and 347SS valve housing offers longer product life compared to competing designs.

- High-temperature silicone Nomex reinforced actuator diaphragm.
- 17-7 PH stainless steel actuator spring gives consistent pressure at high temperature, resists relaxing at temperatures to 900°F (483°C).
- Nitronic 60 stainless steel is used for the valve seat, and valve bushing.
- All stainless steel hardware.
- Mating weld flanges are 304L
- Color anodized aluminum actuator (silver, red, blue, purple, black).
- Flows 330 CFM @ 1PSI differential pressure

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 2/3 the weight of the original GT wastegate and are significantly smaller in height and width. Their compact size combined with the GT II’s V-band inlet and outlet flanges allows for versatile mounting in tight spaces. --- GT II wastegates also include additional wastegate springs which allow for different base boost level starting points. A special tool is also included which allows for the simple installation of the extra wastegate springs.

HKS GT II Wastegates are available with either a 50mm or 60mm stainless steel valve, and have base boost levels that range from 0.8kg/cm2 (11.6PSI) – 2.0kg/cm2 (29.0PSI) and 0.6kg/cm2 (8.5PSI) – 2.1kg/cm2 (29.9PSI), respectively. Like all HKS Wastegates, boost can be raised above the base boost setting by using an HKS EVC or VBC boost controller.