PRP Pro Series Titanium Exhaust Manifold Stud Kit Nissan RB26 3.tecido adiposo PPTX. Platinum Racing Products billet titanium exhaust manifold fasteners are a new addition to our Extensive range of T5 grade titanium which are CNC machined in Australia which suit all aftermarket exhaust manifolds. Please note studs are an M8 All threads are rolled and we guarantee the ultimate in quality, you will also notice an internal Hex and external Hex for ease of use in any exhaust manifold 'turbo type' application. *Depending on your application, you will receive 2x 6 sided hex nuts for installation where the stud placement in the cylinder head makes it difficult to get a socket onto the nut* *Image for display purposes only