Horns Used on 1963 & 1964 Cadillacs

1963 Horns
In 1963 there were two conch shell shaped horns roughly 5" diameter. One Hi Note and one Lo Note.  They were marked with the 'L' and 'H' inside the lip of the horn.  The standard 1963 Hi note horn was originally part # 900-0444, but was then replaced with the smaller 1964 style Hi Note horn # 900 0514 as stock was depleted.  The standard 1963 Lo note horn was originally part # 900-0429, but ws then replaced with the smaller 1964 style Lo Note horn # 900 0513 as stock was depleted.

There was also an optional Eldorado Style "B-Flat" note long trumpet horn offered in 1963. The part # was  199 9947, and stamped 947.  It was standard on the Eldorado and optional on other body styles as a dealer installed option.

1964 Horns
In 1964 there were three horns standard. Two conch shell shaped horns roughly 4" diameter...One Hi Note and one Lo Note.  They were marked with an 'L' and 'H' inside the lip of the horn. There was also a Hi C-Note short trumpet horn standard on all body styles except the Eldorado.

There was also an Eldo Style "Low-C" note Long trumpet horn, standard on Eldorados, and offered as a dealer installed option on other body styles.  The part #  was 199 9896, and stamped 896.  When this horn was installed on non-Eldorado body styles, it provided a unique 4 horn setup.

According to later Master Parts Book (e.g. 1969 MPB) the smaller 1964 style horn were used as replacements as needed for 1963 and earlier Lo and Hi note horns. In fact the Master Parts book shows these horns as being used for 1953 to 1969.

See 1965 Master Parts Book Scan below (click to enlarge):


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Comment by Jason Edge on February 1, 2017 at 8:09am

1965 Master Parts Book scan with horns from 1946 to 1965 added to entry above.


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Correct rims and drums?

Started by Logan Robb in 1963/64 Cadillac Specific Discussion. Last reply by Logan Robb 3 hours ago. 1 Reply

As I am collecting items for a brake overhaul, I’ve have come across many posts about the aftermarket drums not being of quality like the originals. I am fairly certain the drums I have are not…Continue

Powder Coated Rims

Started by Logan Robb in 1963/64 Cadillac Specific Discussion 4 hours ago. 0 Replies

I have a very reputable blasting and powder coating shop near me, come this winter, I am thinking of getting my wheels power coated in preparation for new tires in the spring. Is this a good idea? I…Continue

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Started by Sammy in 1963/64 Cadillac Specific Discussion. Last reply by Tony and Ginny 429 yesterday. 9 Replies

Hi there, after a lot of work on my brakes - new cylinder, hardware, shoes, hoses, going back to old drums, the car still drags to one side. Does this for years now, but I hoped to get rid of it…Continue


Started by nick f eisenbarth in 1963/64 Cadillac Specific Discussion. Last reply by Tony and Ginny 429 on Monday. 11 Replies

Dad passed away in 2020...I inherited his 1963 62 series convertible....it had been sitting since 1997...I put in new gas tank...new fuel filter...had a new head installed with hard valves (to run on…Continue

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Posted by ANGELO MARTINEZ on July 23, 2023 at 10:44pm 3 Comments

  Hope someone can help me to find the harmonic balancer bolt for my 1964 Cadilac Deville 429 engine

in advance, thank you for your help.

Clock ‘64 DeVille

Posted by Matt Vander Hooven on July 23, 2023 at 7:36pm 2 Comments

Is there still a member in the Detroit area that refurbishes clocks?

Matt VH

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I found a diagram that illustrates the main factor in determining a spark plug heat range that I was trying to describe to you during the chapter get together.

Here it is:


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Posted by Logan Robb on May 11, 2023 at 9:04am 7 Comments

Good Morning all! 

I took the 64 into the shop to have some adjustments completed and in the process decided to have the lower ball joints replaced as was recommended the last time I had it in. I ordered the parts and came into the shop. They quoted me nearly $500 to replace those lower ball joints requiring nearly 4hrs of labor. Now this is a reputable shop and they know me by name here and they will continue to get my business. I am just questioning what on earth is…



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