what was 9 fin valve covers orginally put on a corvette


Asked by Mar 19, 2013 at 03:32 AM about the 1957 Chevrolet Corvette Coupe

Question type: General

4 Answers

Strictly aesthetics, just for looks. No real function. Although Corvette aluminum valve covers look pretty much the same to the untrained eye, there were actually six different variations of them used from 1956-1967. 1. 1956 2x4 engines used P/N 3726086: (9) fins, low (.030”) script, staggered bolt holes, and no notches in the upper seal flange. 2. Later 1956 2x4 engines with a revised intake manifold having larger runners required two cutouts to be added to the upper seal flange to clear the larger intake runners, starting about S/N 1650 (650th car built). There was no part number change, and these covers carried into ’57 production. 3. When fuel injection was introduced in 1957, an interference was found between the air meter and the upper fin on the valve cover, and the middle area of the top fin was milled off on fuel injection engines, starting about S/N 1900. 2x4 engines continued to use the “un-milled” 9-fin valve cover. Again, no part number change

4 of 4 people found this helpful.

It's about time I got the right stuff I have a pair that I got about 20 years ago for just $135 I don't have a corvette but what i do have is a 57 Chevy 210 sedan that was a 6 cylinder and a modified it to a almost correct 57 corvette engine and true story it was a preacher car and it's unrestored and wins all the time at shows not that i really care I've own it for almost 25 years will put picture in later and i have a picture of Zora Dunduff at Franklin Mint 30th anavrsaty of the vett i had nothing for him to sign i had a vett shirt on with the older cross flags on so i toke it off right in front of him and he signed it it happen to be a friend close by and he toke a good shot of it will also put that in the photos mite even donate it THANKS DAVID ROCKETMAN

You're welcome rocketman, happy to help

Hello I have a set of 1957 corvette 9 fin milled valve covers are they rare and how much are they worth

Your Answer


Looking for a Used Corvette in your area?

CarGurus has 17,387 nationwide Corvette listings starting at $3,000.


Chevrolet Corvette Experts

  • #1
    John Carson
  • #2
    Vincent Parker
  • #3
View All

Related Models For Sale

Used Mercedes-Benz SL-Class
67 Great Deals out of 3,532 listings starting at $4,000

Used Cars For Sale

2018 Chevrolet Corvette For Sale
2,708 listings starting at $45,995
2017 Chevrolet Corvette For Sale
12 Great Deals out of 4,852 listings starting at $42,950
2016 Chevrolet Corvette For Sale
14 Great Deals out of 1,120 listings starting at $40,787
2015 Chevrolet Corvette For Sale
13 Great Deals out of 756 listings starting at $34,900
2014 Chevrolet Corvette For Sale
8 Great Deals out of 870 listings starting at $34,899

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.