JDC Titanium Cap for STM/JM Fab Tanks

This JDC Cap provides a very tight seal to replace your aftermarket STM or JM Fab Coolant Overflow, ACD, or Power Steering reservoir cap without having to change out the entire tank! Each cap is professionally CNC machined from a single piece of 6AL-4V Grade 5 Titanium. Each cap is laser etched with the circular JDC logo on the top and is hand polished before receiving our proprietary cold anodizing treatment for colors that will last for a lifetime!

Please note: We cannot guarantee the orientation of the laser-etched logos on these caps due to the variation in how the cap screws onto the different reservoirs. 


      (1) Titanium Coolant Overflow Reservoir Cap & Seal

      • Direct replacement for 03-06 Evo 7/8/9 with STM Coolant Overflow, ACD, or Power Steering Reservoirs.
      • Direct Replacement for 03-06 Evo 7/8/9 with JM Fabrication Coolant Overflow Reservoir.
      • Works as a direct replacement for any JM Fabrication reservoir.

      May also fit Evo X with STM reservoirs, but fitment is not confirmed at this time.

      For orders with no titanium, our average lead time is 2-4 business days.

      Orders Containing Titanium:

      Colored Titanium: All titanium is colored to order unless otherwise stated on the item listing. Please see the banner at the top of the website for the current estimated lead times. Production time can vary depending on your order size, products ordered, and the difficulty of custom options requested.

      Bare Titanium/Stainless Steel: In stock items have a processing time of 3-5 business days.

      • 6AL-4V Grade 5 Titanium is super strong and will never rust!
      • Includes a seal for a tight, leak-proof fit
      • Available in polished, solid colors, or our famous burnt or rainbow finish! Email us for custom options.
      • Laser-etched JD Customs USA Titanium logo "Original Logo"
      • Custom-etched logos are available 

      CNC machined from a single piece of Ti6Al-4V (Grade 5) titanium.

      Each piece is hand-polished before receiving our proprietary cold anodizing treatment for colors that will last a lifetime!

      For a color chart and information on our titanium products please click here.

      GR5 Titanium (Grade 5 Titanium) is a premium alloy composed primarily of titanium, with small amounts of aluminum (6%) and vanadium (4%) for added strength and versatility. Renowned for its exceptional strength-to-weight ratio, GR5 Titanium offers superior corrosion resistance, excellent heat tolerance, and remarkable durability. This makes it an ideal material for aerospace, automotive, medical, and high-performance applications, where lightweight strength and longevity are critical. Its ability to be anodized into vibrant colors further enhances its appeal for customization in industries like motorsports and jewelry.

      Customer Reviews

      Based on 1 review
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      K
      K.R. (Winchester, US)
      JDC Titanium Cap for JM Fab Tank

      The fit and finish is perfect for my JM Fab Tank! It is a nice touch to match the other JDC Titanium caps I have in place. Thanks JDC! The titanium addiction continues.

      JD Customs USA

      JD Customs USA specializes in bespoke titanium pieces with virtually unlimited customization options. Known for vibrant colors and unmatched craftsmanship, we bring your creative visions to life. From precision to personalization, our commitment to quality ensures every piece exceeds expectations. At JD Customs USA, we don’t just create products – we deliver perfection.

      View More JD Customs USA Products

      FAQs

      Please read our FAQs page to find out more.

      How Do I Keep My Titanium Products Looking Brand New?

      Installing: Wear gloves when installing titanium parts to prevent oils from your hands causing a "faded" look. After installation, clean the part before applying heat to avoid baking oils onto the surface.

      Cleaning: Use our JDC Titanium Cleaner, designed to safely clean titanium without damaging the finish. Alternatively, clean with soapy water, a microfiber towel, or Windex, rubbing alcohol, or Clorox wipes.

      Avoid: Harsh chemicals like water spot remover, engine degreaser, brake cleaner, metal polish, or acidic cleaners—they can damage the oxidized layer and remove the color.

      Tip: Always clean when parts are cool to avoid water spots or tarnished finishes.

      For detailed care tips, visit our Titanium Maintenance and Care page.