This upper plenum permits an additional 100cfm of air flow plus the inlet opening is 75mm which will match up with our throttle bodies. These plenums can also be used with the stock or 70mm throttle bodies. All stock connections are utilized. Available in satin and polished finish, high quality at affordable prices.
Polished / Satin
UpperPlenum for 4.6L 54154 / 54155
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