Hello, I have a set of black side exhaust headers that were on a 69 L88 Corvette that I used to own. I spoke to prior owners of the car and one of them thought that the pipes might be GM. I am famaliar with the fact that Kustom industries was the primary manufacturer of L88 headers but was also told that there was a second manufacturer of L88 headers. Mine are made by JR and there is a stamp on the header flange that reads JR with three numbers. Any info would be greatly appreciated.
L88 Headers
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