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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 08-23-2008, 08:34 PM   #1
vogs77
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Default What length and thread size are the upper plenum cobra bolts

I just got my use upper and lower cobra intake but it did not include the bolts for the upper plenum. Can anyone tell me the thread size and length to buy. Will the stock ones work with the cobra intake??
thanks
mat
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Old 08-24-2008, 02:03 AM   #2
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Intake bolts 5/16 X 18

The stock bolts will work just fine!
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Old 08-24-2008, 12:24 PM   #3
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they sell gt-40 bolt kits that would probably work
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Old 09-19-2012, 02:53 PM   #4
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Sorry to bring back an old thread, but I just want to confirm that 5/16x18 is the right bolt to use for a stock upper. And what length are they? I lost all of mine & need to replace them.
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Old 09-19-2012, 04:54 PM   #5
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Upper Intake to Lower Intake =4 corner bolts are 5/16 x 1 5/8" .... the 2 middle bolts are 5/16 x 6".
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Old 09-19-2012, 04:54 PM
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03, 1989, 50, 95, 99, bolt, bolts, cobra, intake, length, mustang, plenum, size, thread, upper

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