Although ARP doesn’t offer exhaust studs for Porsche engines, LN Engineering offers aerospace quality titanium fasteners from Silverlake Projects for most Porsche models. These exhaust manifold fastener kits for aircooled and watercooled Porsche engines include titanium studs, 12 point nuts, and copper washers- all made in the USA and Japan exceeding OEM Porsche specifications. Corrosion resistant, Silverlake’s titanium exhaust studs prevent seizing but also won’t come loose due to vibration, so you don’t have to worry about unexpected exhaust leaks. These are the finest fasteners you can purchase for your Porsche’s exhaust system.