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Timmyboy, only if it is an extended cab truck. In extended cab trucks, the OEM rear jump seats must still be in place, but a box can be built to hold the subs as long it is not above the bottom edge of the windows and does not pass beyond the front trailing edge of the door jambs. Regular cab trucks can have a box behind the front seats and they do not have to meet the string test requirements. If you pulled the seats out of a regular cab so the subs would not flap up against the seats, that would also put you in Super Street. Hope that answers your questions...
------------------ James T. Certified dB Drag Judge dB Drag Rules & Board Committee Member
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