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Why are my anodized parts (Fuel rails, TGVs, caps, etc) different shades, or look different from the pictures online?
Last Updated: 07/08/2019
Anodizing is a coating process with many variables which can affect thickness and color. While all care is taken to achieve the best consistency possible, batches of anodized components rarely match exactly. Here is a list of variables which can affect the final color of anodized components:

  • Anodic Coating thickness
  • Tin vs. Cobalt-based 2-step anodizing processes
  • Dye used, saturation vs unsaturated anodizing processes
  • Coil vs. batch anodizing processes
  • Type of solutions used. For example, different 2-step solutions.
  • The temperature of all solutions
  • Concentration of solutions
  • Type of etch used
  • Time in each process
  • Size of the load (sqft per load)
  • Racking method (square inches of actual current-carrying racking area).
  • Current density variation caused by part configuration, causing voids and shielded areas in the finish.
  • Differences in aluminum alloys
  • The shape of the product to be coated.


As you can see, the number of variables that can be introduced in one batch of anodized components can be astronomical. For this reason, IAG does not guarantee color consistency of anodized products. We do, however, make every attempt to match the color of like products whenever possible.



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