2Mystic

Thanks for the reply. Aluminum calipers are available, but not in a stock configuration (i.e. bolt on), and class rules prevent the change.

This probably a really stupid question to ask in a forum like this, but I need some advice to make a decision. I am a race car driver and do all my own wrenching. I need new rear brake calipers and my choice is between Cast Iron or Steel. Which one should I get? How do I tell the difference OR do I need to be concerned about any difference. The cost is marginal between the two, so that is not an issue. Thanks for any input.