1969 427 side exhaust

[Gary H.]

I posted lastnight on the CF. Figured I would also post here.

Does this 427 side pipe appear to be original? I bought it from an online vendor as NOS. Dont care if it is NOS...I want it on my car if original. I have aan aftermarket pipe on my passenger side that sounds like crap.

I was told that i was stored for years in a climate controlled locker. In the 2 days I have had it there is some surface rust forming on the bare metal pipe. My local GM parts guy told me that these were still produced into the 80's.

I can return the pipe if not GM.

What are your thoughts?

Gary

[Dick W.]

[Gene M.]

Re: 1969 427 side exhaust

Gary,
I agree with Dick. But I think the welds have achieved some attention. They look way more "extensive" than the originals from my memory.

[Gary H.]

Re: 1969 427 side exhaust

There is a chance that these could be original over the counter from the last production run.

Is there anything else I could look for? I only bought one pipe, but he had a pair. I didnt see any photos and wanted to make sure they were original before buying the other.

If original I will have him ship me the other as my drivers side pipe has some speed bump dents.

Gary

[G A.]

Re: 1969 427 side exhaust

This is interesting.

When I bought my car it came with a set of "NOS" pipes. They too have the "W" stamped on the rear mount and have the same appearance as Gary's pipe. Based on the discussion about mandrel vs. machine rolled bends I thought them to be repops, since the bends were obviously mandrel made. Am I to take then that '69 side exhaust are an exception to this "rule" ?

Dan

[Gary H.]

Re: 1969 427 side exhaust

A few more pics. In daylight there are some numbers hand stamped on the pipe. Any clue what these are for?

[Joe L.]

Re: 1969 427 side exhaust

This is interesting.

When I bought my car it came with a set of "NOS" pipes. They too have the "W" stamped on the rear mount and have the same appearance as Gary's pipe. Based on the discussion about mandrel vs. machine rolled bends I thought them to be repops, since the bends were obviously mandrel made. Am I to take then that '69 side exhaust are an exception to this "rule" ?

Dan

Dan------

My knowledge of side pipes and components thereof is very limited (and will remain that way as a matter of choice). However, keep in mind that these sidepipes were a very low volume item, especially considering that the 69 style was only used for one model year. It may very well be that it was more cost effective to manufacture them by mandrel bending than using dies.

[Joe L.]

Re: 1969 427 side exhaust

There is a chance that these could be original over the counter from the last production run.

Is there anything else I could look for? I only bought one pipe, but he had a pair. I didnt see any photos and wanted to make sure they were original before buying the other.

If original I will have him ship me the other as my drivers side pipe has some speed bump dents.

Gary

Gary------


The left side pipe was discontinued without supercession in July, 1994. The right side was discontinued without supercession in October, 1991. However, manufacture of these pieces probably ceased well before that time and the SERVICE inventory was drawn down until exhausted on the aforementioned dates.

[Alan S.]

Re: 1969 427 side exhaust

Hi Gary,
I have a set of SB pipes I bought over the counter in April of 1971.
The bends in the pipes look VERY similar to the bends yours, the bracket has the W stamp, and the welding is quite 'lumpy' and might be described as excessive.
I don't, however, see any sign of the stamps that your pictures show.
NICE PIPES!
Regards,
Alan

[Gary H.]

Re: 1969 427 side exhaust

Thanks for your help. I guess that these pipes are GM. I cant wait to get them on my car.

A guy on the CF suggested using a product called VHT stainless steel paint on the pipes before mounting them to keep them from rusting. Has anyone ever done something like this? Is it worth looking into or is it a waste of time.

Gary

[Joe L.]

Re: 1969 427 side exhaust

Thanks for your help. I guess that these pipes are GM. I cant wait to get them on my car.

A guy on the CF suggested using a product called VHT stainless steel paint on the pipes before mounting them to keep them from rusting. Has anyone ever done something like this? Is it worth looking into or is it a waste of time.

Gary

Gary------


The VHT paint will provide a lot of rust protection and will be relatively durable, even at exhaust system temps. However, it will also be easily detectable during judging if that's an issue for you. On the other hand, rust is easily detectable, too, and would probably cause a loss of condition points if very extensive.

[Tom N.]

Re: 1969 427 side exhaust

Gary,
I have a '67 big block with sidepipes and did used VHT paint on them after two years it looks just
like the first day I had sprayed them, if you do , make sure you scuff them them with a 3M pad
and clean with a solvent before painting. My car isn't judge so can't tell you if decide to and want your car judge.
Tom

[Mark D.]

Re: 1969 427 side exhaust

I'm too lazy to pull these out of the floor joists but, here's a couple pics.

No mandrel bend here...



The welds on mine look like yours...



I bought these from Lou Groebner, Sr. about a hundred years ago. They have no numbers stamped in them. As Papa Smurf has pointed out, yours are Walker manufactured pipes.

[John H.]

Re: 1969 427 side exhaust

None of the pipes pictured in all the photos in this thread have been mandrel-bent; all were formed using conventional high-volume external shoe-and-die pipe bending tooling. Mandrel pipe-bending tooling wasn't used for production-line exhaust pipes.