C2 (2 1/2") Exhaust Clamps --- Again---

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Bob,

I've also been told based on one '66 Bowtie example that for '66 there was no part or assembly numbers stamped into the rear tail pip tip clamps. So, either things changed from '63 or perhaps there were two suppliers as a previous poster suggested and maybe one supplier stamp the number and one didn't.

Gary

Gary,
As I posted in the beginning I'm very familar with 63 because that year has been my main interest for 45 years.
I have clamps that were removed from low mileage original 63s with numbers and those clamps are what I've used restoring my 63s.
It would have been much easier for me to go with blank clamps or the service 883 numbered replacements.
I'm sure there must be other 63-67 cars with original clamps and my advice for 64-67 guys would be to keep looking at low mileage dry cars.

A short story.....In the seventies nobody cared if a low mileage car had original exhaust or clamps. I was given the exhaust off a very low mileage (less than 6,000 mile) 63 because the new owner wanted the car dependable for driving. At the time the 63 rear exhaust shields were what I really valued/ wanted but going forward 40 years everything off that car has interest.
Those clamps and exhaust shields are on my 63 today and if it wasn't such a chore I'd remove them and post a pic.

IMHO.....those rear clamps (especially in 63) had GM and part numbers.

Bob Jorjorian

[Gary B.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Bob,

I don't doubt what you've found on '63s. I'm only saying that something different has been observed on a '66 Bowtie car. Things may have changed and no doubt different suppliers likely provided parts that were slightly different from a cosmetic viewpoint.

Gary

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Bob,

I don't doubt what you've found on '63s. I'm only saying that something different has been observed on a '66 Bowtie car. Things may have changed and no doubt different suppliers likely provided parts that were slightly different from a cosmetic viewpoint.

Gary

Gary,
possible but I'd want to see to see more than one car with blank clamps before I formed an opinion.
I personally think GM thought enough to have exhaust pipes and mufflers numbered so clamps being numbered isn't out of the norm.
If you ever look at an AP tuff grip clamp it is 100% like a GM clamp without the GM & numbers........even the smallest detail is present on both clamps.
Bob Jorjorian

[Gary B.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Bob,

On the '63 clamps you've seen which side of the saddle was the part/assembly number stamped? The side that has the horizontal reinforcement detail protruding outward? Or inward?

Gary

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Gary,
the number is stamped on the raised bar. Outward.

Bob Jorjorian

[Alan D.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Similar to this -

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Similar to this -

Yes, stamped in the same location as your pic.

Bob Jorjorian

[Gary B.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Bob et al.,

Over the past several days I've now seen photos and talked to owners of 3 Bowtie/Preservation cars, two '66s and a '67. On those cars, for the 2.5" clamp at the front to mid-pipe connection there is no part/assembly/patent number stamping. Unfortunately, I haven't seen good photos of the 2.0" tail pipe tip clamps. But I will ask keep looking and report back if i find anything relevant.

Gary

[Rob A.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

I've attached a few photo's of the clamps removed from my '63 Coupe. A portion of the exhaust has been replaced at some point during its life and I've replaced it with a system from Allen's. Are these clamp original and worth saving?

[Gary B.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Rob,

Are you talking about for the location between the front and mid-pipes, just in front of the main frame cross member?

Gary

[Rob A.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Rob,

Are you talking about for the location between the front and mid-pipes, just in front of the main frame cross member?

Gary

Gary,

No, at the cross member the '63 support is integral with the clamp. I assume the clamps I've pictured would be used on the exhaust tips and/or on '64 and later cars at the cross member.

Thanks,
Rob

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Gary,

No, at the cross member the '63 support is integral with the clamp. I assume the clamps I've pictured would be used on the exhaust tips and/or on '64 and later cars at the cross member.

Thanks,
Rob

Rob,
those are the correct STYLE of clamps. Originals would not have the plate below the saddle.
They're probably an aftermarket brand like AP.
They'd work fine. They do have value...... don't pitch them.
Bob Jorjorian

[Tony S.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Good discussion. For what it's worth the 65 team researched this topic and published in the latest 6th ed that production clamps lack a part number on the gusset.

[Gene M.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

There appears to be more than one supplier of clamps. The one style has a taller lower section and the other is thinner with a reinforcement plate that is assembled prior to the nuts. Personally I have only seen on actual cars the one without the reinforcement plate. It does seem a bit odd that there would be such differing configurations during the same period since the assembly does differ.

[Bob J.]

Re: C2 (2 1/2&quot Exhaust Clamps --- Again---

Good discussion. For what it's worth the 65 team researched this topic and published in the latest 6th ed that production clamps lack a part number on the gusset.

Tony
No part number for both size clamps?
When does the 65 team feel the part number was eliminated on the 2 inch clamp?
Bob Jorjorian