Originally Posted by Jason Drew


I don't know the reasoning for the choice of material, it's Beyond Redline Performance who actually makes it and to Tim Zimmer's knowledge, none have ever broken or galled up.

Now would making it out of 4140 significantly change the price? I'm assuming like most parts, a good part of the price is the overhead and r&d cost attached to the part, not the material itself.


I was just responding to your comment that Chromoly must be priced like gold. I am sure there is a ton of R&D and considerable machining involved, and the piece would not be cheap regardless, but I think chromoly is most commonly used in tube form, like for chassis or roll cages. If I were making these today, I would probably try 4140 and possibly nitride the surface after machining. Are the oil passages circular grooves or a spiral groove?

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