Description All GFB wastegates feature an investment cast body made from 253MA chromium-nickel stainless steel, a CNC machined billet stainless valve, and all stainless steel weld-on fittings and hardware, whilst the diaphragm is nomex-reinforced silicone. All this adds up to a wastegate built to handle extreme conditions with reliability you can trust! Most compact wastegate range on the market! Body, valve, seat and all mounting hardware is CNC machined from high-temp stainless steel Actuator housing CNC machined from billet 6061 aluminium Nomex-reinforced silicone diaphragm Internal shroud protects valve stem from excessive heat and prevents carbon-related sticking V-band clamp mounting system Made in Australia under ISO 9001