4 3/8" normal 5 1/4" with steel bump for 10s

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  2015-up Ford F150 SuperCrew Sub Box Ported Stage 1

  $500.00 Select options
• 

  2015-up Ford F150 SuperCrew Sub Box Ported Stage 2

  $600.00 Select options
• 

  2015-up Ford F150 SuperCrew Sub Box Single Sealed Stage 1

  $300.00 Select options
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  2017-up Ford Super Duty SuperCrew Sub Box Ported Stage 1

  $500.00 Select options
• 

  2017-up Ford Super Duty SuperCrew Sub Box Ported Stage 2

  $600.00 Select options
• 

  2017-up Ford Super Duty SuperCrew Sub Box Single Sealed Stage 1

  $300.00 Select options