JDC Titanium O2 Housing Stud Kit | Mitsubishi Evo 4-XJDC Titanium O2 Housing Stud Kit This kit will replace the rusty hardware on your O2 housing and will never rust or corrode! The JDC titanium stud kit is made from Ti6Al 4V (Grade 5) titanium and incorporates a hex key tip that allows them to be easily installed using an Allen wrench. For a color chart and information on our titanium products please click here. For a full list of colors check out our JDC Titanium Color Options. If you want to learn