4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

throttle body

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Old 02-18-2012, 08:52 PM
  #1  
B Davis
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Default throttle body

Whats the largest throttle body I should put on my 99 gt that is mostly stock except for a bbk intake ,pullys ,magnaflow exhaust and superchip tuner.and is a throttle body spacer worth the money.Thanks.
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Old 02-18-2012, 08:53 PM
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Bpohlman13
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70mm.
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Old 02-18-2012, 08:59 PM
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cliffyk
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^+1, here's why.

And BTW, the stock upper plenum is the weak point, you will see in the data linked to above that any aftermarket plenum can flow as much or more air with the stock 65 mm TB; as can the stock upper plenum and any aftermarket TB...
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