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They are NOT made by Fine Lines or Inline Tube. The one I got was from First source performance, a e-bay reseller and it was the same part that FineLine and Inline had at Calsile as well as Mega parts and many others. They are made by one MFG and sold by many resellers. The one on display at Carsile in the Fine Lines booth was the same defective one I had from First Source. I had the owner of Fine Lines test it himself and he was suprised and said he would call the MFG and have the problem fixed. The ones with the bad piston in the pic above is for a 71-72 e-body or b-body. They may be fixed by now but many were sold befor they knew about the problem.



Actually that's not correct, there is two different manufactures of the disc brake valve, only one for the drum brake valve.

I would call Bob Groser (owner of Fine Lines) and he can explain the whole deal to you.