Re: 66 vette BB side exhaust original or reproduction
The sound is one thing, they tend to be a bit louder. Originals are mellower. Also the pipe welded into the chambered part is thinner on the originals. There's a definite step-up going into the chambered part. Reproduction pipes have a thicker pipe leading into the chambered part of the pipe. If it is NOS, it may have the part number tag on it. The chrome end piece is also larger on the reproduction sidepipes I've seen.
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