'65 N11 exhaust

[Blake W.]

I recently saw an ebay add for a set of N11 exhaust pipes and mufflers. My car has the same numbered mufflers. I don't know if mine are originals but I do know that my car came delivered with N11, per original window sticker. Maybe they could be service replacements?? Here are numbers:

GM
3845737
3 2 209 8A

GM
3845736
5 1 146 2 A

PS: curious as to the last set of numbers also, IE dates ect. Thanks Blake

[Andy C.]

Re: '65 N11 exhaust

Hello; To the best of my knowledge, ORIGINAL factory N11 systems did not have the raised part numbers,etc. on the muffler, but the GM service replacements did! The original systems installed at the plant had the words OFF ROAD sprayed on the mufflers in yellow ink.....

[Steve B.]

Re: '65 N11 exhaust

Andy is correct. OEM off road mufflers only had the letter A on them, no part numbers or dates with the OFF ROAD ASSEMBLY sprayed with yellow ink.

[Blake W.]

Re: '65 N11 exhaust

Thanks Andy and Steve for the info.

Blake

[John H.]

Re: '65 N11 exhaust

I recently saw an ebay add for a set of N11 exhaust pipes and mufflers. My car has the same numbered mufflers. I don't know if mine are originals but I do know that my car came delivered with N11, per original window sticker. Maybe they could be service replacements?? Here are numbers:

GM
3845737
3 2 209 8A

GM
3845736
5 1 146 2 A

PS: curious as to the last set of numbers also, IE dates ect. Thanks Blake

Blake -

Both sides are GM Service replacements:

The 5737 was built in Arvin plant #3, on 2nd shift, on the 209th day of 1968 (or 78).

The 5736 was built in Arvin plant #5, on 1st shift, on the 146th day of 1972.

[Steve B.]

Re: '65 N11 exhaust

John, I have also seen a 735 part number used for N11 exhausts. I believe the 737 unit replaced it but I was wondering why. Thanks in advance.

[Blake W.]

Re: '65 N11 exhaust

Thanks John, Either way looks like one of them sat on a shelf for some time before being sold. Appreciate the info. Blake

[Tony S.]

Re: '65 N11 exhaust

If anyone has a photo of an original production 1965 N11 muffler, I'd appreciate it if you would post it on here or email it to me.

Thanks.
Tony

[Blake W.]

Re: '65 N11 exhaust

I too would like to see that, thanks Tony

[Alan D.]

Re: '65 N11 exhaust

Interesting discussion, my thoughts were wrong (should not have agreed with judge, ah next time)

Hear is some information from John Daly and also see
N11 Off Road Muffler Stamping Location

The part drawing for 3845292 is on the GM system...it says simply:

PARTS SUPPLIED FOR SERVICE MUST HAVE
SOURCE IDENTIFICATiON, G.M. TRADE MARK
AND G.M. PART NUMBER EMBOSSED ROLLED
OR ETCHIED IN .15 IN HIGH LETTERS IN A
LOCATION VISIBLE AFTER INSTALlATION
ON VEHICLE.

[Wayne M.]

Re: '65 N11 exhaust

Here's a service N11 (driver side) that I bought at the GM dealer about 1980 or 81 {if memory serves me well}.

Using John H's code-break, looks like Arvin plant #1, 1st shift, 323rd day of 1981.

So I guess my memory was a year or two off , depending on inventory.

[James W.]

Re: '65 N11 exhaust

Scott,

Attached are the pictures that Pete Lindahl was kind enough to send me.


Regards,

James West
Omaha, NE.