Midyear tail pipe extensions revisited

[John D.]

I have three variations of tail pipe extension for 63-67. 1st pair have a seam, no part number, magnetic and light weight for sure.
2nd pair are Stainless with no seam, very thick and weight a ton.
3rd pair have a seam, small parts number and logo. Triangle is the logo?
3819573. Except for the first 3 the entire number is up on the expanded part of the extension that slips over the muffler. The heat shield on the 63 may cover this number so it's not visible when installed.

Qt: The 100% correct ones I assume are my 1st pair. But they aren't show condition.
The 3rd pair are NOS out of the box but have the tiny part number. Am I correct in assuming (uass) that when in stalled judges can't see the number?

Last question that is bugging me. The Stainless pair are in the original boxes. I can't remember crap anymore so did GM sell them like this or did I or bubba rebox them. Put repros in original boxes I mean?
One more question: The ones i want to use are magnetic. It doesn't appear that they are chrome plated steel. I have them in front of the screen and they appear to be stainless but magnetic. If this is so I can cheat and buff the numbers off?
Recap: are the numbers seen when installed on a 63 with the heat shield.
Can the numbers be buffed off.
Is the material a Stainless steel alloy that is in fact magnetic?
Thanks, John D.

[Dan H.]

Re: Midyear tail pipe extensions revisited

Hi John, yes stainless can be magnetic. The first pair sound like the originals on my 64, thin, offset seam, magnetic. The grade of stainless used determines the degree of magnetism. Check the seam location of the numbered pair against the thin ones. Buffing off the PN would work if you like the look of them. Being an old Minesweep Sailor I had to test for all magnetic items on my ship with a meter and reject stainless that was magnetic. Have fun! Regards
Dan

[John D.]

Re: Midyear tail pipe extensions revisited

Hi John, yes stainless can be magnetic. The first pair sound like the originals on my 64, thin, offset seam, magnetic. The grade of stainless used determines the degree of magnetism. Check the seam location of the numbered pair against the thin ones. Buffing off the PN would work if you like the look of them. Being an old Minesweep Sailor I had to test for all magnetic items on my ship with a meter and reject stainless that was magnetic. Have fun! Regards
Dan

Dan, I spotted the seam location early this morning. The numbered ones have a seam on the side where the plain ones have a seam on the bottom.
On page 144 of the new manual I see it clearly states that the welded seam is along the bottom. So that blows my plan of using the mint NOS ones with the seam on the side.
Going to have to get the minor dings removed in my originals it seams or seems. You collect all the NOS crap you bought from your local dealer for an eon and then when you go and think you have something first class to use on the car you find out all your have is a service replacement POC part. Thanks, JD

[John D.]

Re: Midyear tail pipe extensions revisited

Jorjorian said to me there is no such thing as NOS correct exhaust tips for a 63 Corvette. He said the only way to have correct ones on a 63 is to restore originals. Since I have three variations of NOS POC ones here and had a 4th variation that I sold I am inclined to believe him.
So case closed. Answer is there isn't any answer. You either have originals or you have SR's. JD

[Kent K.]

Re: Midyear tail pipe extensions revisited

John,
It sounds as though the first pair of extensions you initially listed is correct. Since your question extended to 1967, my original '67 exhaust pipe extensions are thin (flash chromed???) stainless steel, slightly magnetic and have a seam along the bottom. They have no part numbers.

[John D.]

Re: Midyear tail pipe extensions revisited

Ken, I hear the term flash chromed but mine don't appear to be chrome-the originals that is. Just cheap SS. My friend is working them over right now as they are going back on. Thanks, JD

[Harry S.]

Re: Midyear tail pipe extensions revisited

Just plain old SS, no chrome.

[Kent K.]

Re: Midyear tail pipe extensions revisited

O.K. guys. I mistook their beauty as being something they're not. I guess they are just plain ol' ss. But.... they are the original ones that came with the car.

[Duke W.]

Re: Midyear tail pipe extensions revisited

My originals match your #1 description. Material thickness averages about .025". There is a very clear "A" stamped on the inlet end, about 3/16" high.

Some "low grade" stainless steels are magnetic, and these are the common stainless steels used in exhaust systems. Mine definitely are not plated. They can be polished to a nice satin luster, but tend to tint slightly yellow with use. An occasional polishing will bring back the original silver satin luster.

Duke