smog tubes plating

[Ls6 Ragtop]

Rick,
Are you sure those were NOS? I question that because of the amount of steps in the transition from main body to the outer branches of the tube. Originals I have and have seen use 2 steps in downsizing the main body to the outer branches whereas repops commonly have 3 like what yours look like. My NOS ones are also more of the brown-black finish that I've had on survivor originals with the 2 steps. I'm sure the color varied in production, but I've not seen anything as green as yours look from GM from the the 69-70 time frame.