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Old 03-19-2019, 11:51 AM   #1
Cmillet
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S10 brake booster question

What size hole do I need to drill through the firewall to allow my brake center bore to pass through? Trying to pick up a bit before I go home this afternoon.
Thanks.
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Old 03-19-2019, 12:57 PM   #2
joedoh
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Re: S10 brake booster question

3"
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Old 03-19-2019, 02:16 PM   #3
Cmillet
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Re: S10 brake booster question

Thank you Sir!
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Old 03-19-2019, 02:34 PM   #4
Cmillet
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Re: S10 brake booster question

Of course they are out of the 3". Could I get by with a smaller diameter? Maybe 2 1/2?
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Old 03-19-2019, 08:25 PM   #5
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Re: S10 brake booster question

no, there is a lip on the booster that fits through the hole, has to be 3" in my opinion. unless you plan to open up the hole with some snips, in which case you could cut the hole with some sharp snips, I have done it on a firewall before! get left or right snips and cut the correct direction
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