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Engine 1999 GT - Throttle Body/Plenum Mismatching Bore Size

  • Thread starter Thread starter Snazzyduck
  • Start date Start date Sep 30, 2018
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Snazzyduck

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Sep 22, 2018
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Sep 30, 2018
#1
  • Sep 30, 2018
  • #1
I was looking into aftermarket Throttle Bodies and Plenums for my 1999 Mustang GT. Would there be a problem if I had a Throttle Body with a smaller bore size than the plenum. I don't expect any flow or engine issues, but maybe some has experience with this or insight to add? Any banter is welcome, even if you're not necessarily a car 'expert.'
 
Last edited: Oct 23, 2018

General karthief

wonder how much it would cost to ship you a pair
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#2
  • Oct 23, 2018
  • #2
I will respond with this suggestion, I would find out if there is a spacer that is 70mm and open the back side up to fit the 75mm intake opening. Just a suggestion. Although the miss match may not matter since it is just air into a plenum
 

Noobz347

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#3
  • Oct 23, 2018
  • #3
You are purchasing both items? Why would you not purchase them in matching size?


I cannot think of a good reason to install a throttle body with an opening that is smaller than the plenum can accommodate.
 
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