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82 Radiator Mount Cushions

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Old Apr 2, 2026 | 02:07 PM
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Default 82 Radiator Mount Cushions

The factory assembly manual calls out for #379932 for the upper two cushions and #379941 for the two lower cushions.

I can't find those anywhere but I can find #33530 for the upper and #33531 for the lower. Are these the correct cushions?

One last thing to fix in the engine compartment... I "think".

JT
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Old Apr 2, 2026 | 06:08 PM
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Originally Posted by jthornton
The factory assembly manual calls out for #379932 for the upper two cushions and #379941 for the two lower cushions.

I can't find those anywhere but I can find #33530 for the upper and #33531 for the lower. Are these the correct cushions?

One last thing to fix in the engine compartment... I "think".

JT
Correct numbers but you will have trouble looking for parts using old numbers.
Here are all 4.
Cushions
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Old Apr 2, 2026 | 06:24 PM
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The first thing that came to mind was,
I'd bet Zip would have those. And then I read the reply above.
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Old Apr 2, 2026 | 06:32 PM
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Originally Posted by MelWff
Correct numbers but you will have trouble looking for parts using old numbers.
Here are all 4.
Cushions
Too bad they are on backorder... I hope the ones I ordered from Summit are correct.

JT
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Old Apr 2, 2026 | 08:25 PM
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Rockauto has them also
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Old Apr 2, 2026 | 11:33 PM
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Give DeWitts a call, they probably have them in stock.
They also have their heavy duty sets that are really nice.
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Old Apr 3, 2026 | 05:45 AM
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Originally Posted by Fly skids up!
Rockauto has them also
I only saw the lower cushion at Rockauto. I "assume" the upper and lower are different because they have different part numbers. I'll find out Tuesday when the ones I ordered from Summit arrive.

JT
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Old Apr 3, 2026 | 06:39 AM
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I don't know the difference between the upper and lower insulated but I was able to use them all around
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Old Apr 5, 2026 | 01:13 PM
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Also check Bairs, they have very reasonable shipping fees.
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Old Apr 6, 2026 | 07:31 AM
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Doesn't the size/thickness of your radiator play into which cushions you purchase? Do you have the HD cooling? Are you using a OEM radiator? Possibly a previous owner updated to a thicker core radiator.
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Old Apr 6, 2026 | 07:59 AM
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Think the brackets the radiator sits in are fixed size, so cushions will also be fixed in size.
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Old Apr 6, 2026 | 09:07 AM
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Originally Posted by KENS80V
Doesn't the size/thickness of your radiator play into which cushions you purchase? Do you have the HD cooling? Are you using a OEM radiator? Possibly a previous owner updated to a thicker core radiator.
Yup I noticed there are more than one thickness of radiator. The 82 came with the thicker radiator and the electric fan.

JT
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Old Apr 6, 2026 | 09:08 AM
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Originally Posted by sphil
Think the brackets the radiator sits in are fixed size, so cushions will also be fixed in size.
The outside of the cushions are the same size but the insides are different for different thickness radiators.

JT
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Old Apr 6, 2026 | 10:26 AM
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https://www.zip-corvette.com/76l-82-2-5-8in-radiator-mount-upper-lower-cushions-4.html

https://www.zip-corvette.com/76l-82-2in-radiator-mount-upper-lower-cushions-4.html
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Old Apr 6, 2026 | 10:33 AM
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Originally Posted by jthornton
The outside of the cushions are the same size but the insides are different for different thickness radiators.

JT
Got it👍
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Old Apr 6, 2026 | 02:30 PM
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Definitely a different outside shape between the upper and lower at one end.

JT
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Old Apr 6, 2026 | 05:08 PM
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Well I'm screwed for a while, my radiator measures 2 5/8" where the cushion fits but a 2 5/8 cushion measures 3 3/4" across the opening and mine is 2 3/4". Now the fun part Bubba put one upper and one lower in the upper holders... I've not raised the car up to see if any are in the lower holders. So I'm assuming Bubba put a radiator from an 80 or older C3 in there dunno.

No one has the 2" cushions in stock that I can find... well almost no one Top Flight has the set but wow the shipping is high but the price was low and they are CA parts so they are on order.

The radiator core measures 1 5/8" across the top.

I do see there is some cushions under the radiator...

JT

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Old Apr 6, 2026 | 05:23 PM
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Originally Posted by jthornton
Well I'm screwed for a while, my radiator measures 2 5/8" where the cushion fits but a 2 5/8 cushion measures 3 3/4" across the opening and mine is 2 3/4". Now the fun part Bubba put one upper and one lower in the upper holders... I've not raised the car up to see if any are in the lower holders. So I'm assuming Bubba put a radiator from an 80 or older C3 in there dunno.

No one has the 2" cushions in stock that I can find... well almost no one Top Flight has the set but wow the shipping is high but the price was low and they are CA parts so they are on order.

The radiator core measures 1 5/8" across the top.

I do see there is some cushions under the radiator...

JT
Thats exactly why I don’t buy from Topflight, their shipping is rediculous. Check Bairs website for cushions, their shipping costs are VERY reasonable compared.
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Old Apr 6, 2026 | 05:27 PM
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Originally Posted by sphil
Thats exactly why I don’t buy from Topflight, their shipping is ridiculous. Check Bairs website for cushions, their shipping costs are VERY reasonable compared.
A google search for Bairs returns a bunch of fast food places and door dash. I've not heard of them before do you have a link?

JT
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Old Apr 6, 2026 | 05:47 PM
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I forgot to mention that returns to Summit Racing are free and easy... I wish they had the 2" ones.

JT
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