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[C2] Knurled drain petcock 🙋‍♂️ question

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Old May 28, 2026 | 10:44 PM
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Default Knurled drain petcock 🙋‍♂️ question

Hello forum,
Im interested in installing these in my block for draining the anti freeze in my 1965/327.
I see Summit Racing has them also 2 vendors on eBay.
Does anyone know if these are all sourced from the same manufacturer?
The threads reported great success with the Summit Racing supplied one.
Just trying to figure out which are a better buy especially if they are all from the same manufacturer.
Thank you in advance.
Marshal

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Old Jun 8, 2026 | 03:31 PM
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Default Block Drain Petcocks

I decided to go with Summit Racing for my petcocks based on positive past feedback.
Thanks
Marshal
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Old Jun 8, 2026 | 05:25 PM
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On ALL my engine builds, I remove the factory plugs and install brass petcocks, commonly available at most parts stores, NAPA, O'Reilly, etc.











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Old Jun 8, 2026 | 08:49 PM
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Thanks DZauto👍
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Old Jun 8, 2026 | 08:57 PM
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Originally Posted by marshal135
Hello forum,
Im interested in installing these in my block for draining the anti freeze in my 1965/327.
I see Summit Racing has them also 2 vendors on eBay.
Does anyone know if these are all sourced from the same manufacturer?
The threads reported great success with the Summit Racing supplied one.
Just trying to figure out which are a better buy especially if they are all from the same manufacturer.
Thank you in advance.
Marshal
Marshall - Any chance of a photo from you ? Thx

Last edited by QIK59; Jun 8, 2026 at 09:05 PM.
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Old Today | 03:16 PM
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Default Drain petcocks

Not installed yet
The picture is of me an my 1965 L76.
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Old Today | 04:10 PM
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Originally Posted by marshal135
Hello forum,
Im interested in installing these in my block for draining the anti freeze in my 1965/327.
I see Summit Racing has them also 2 vendors on eBay.
Does anyone know if these are all sourced from the same manufacturer?
The threads reported great success with the Summit Racing supplied one.
Just trying to figure out which are a better buy especially if they are all from the same manufacturer.
Thank you in advance.
Marshal
So WHAT is the price on these that you are trying to figure which to purchase ?
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