This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.

This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind the seat version that will fit the 1500 SERIES (1/2 ton) crew cab and the Heavy Duty Series crew.THIS WILL ALSO FIT 2007 CLASSIC BODY GMC/ CHEVROLET SILVERADO ONLY. WE HAVE ANOTHER BOX THAT FITS THE NEW BODY STYLE 2007 TRUCK.

• Fits two 8 inch or two 10 inch subwoofers or Fits one 12 inch subwoofer
• Subs fire down underneath back seat
• MDF wood
• Carpeted in Charcoal Grey Carpet
• Air space = .65 cu ft per sub
• Mounting Depth = 6 1/4 inches
• You must remove bar under the rear seat on passenger side.  Instructions are in video and you may contact us for instructions too.

Subwoofer magnet must be less than 6 inches.

DOES NOT WORK WITH BUCKET SEATS, MUST HAVE FULL REAR BENCH OR 60/40 SPLIT SEATS.

THIS BOX WILL NOT FIT IF YOU DON'T HAVE A BRACE ON THE PASSENGER SIDE UNDER REAR SEAT.

Hole cutouts:

• Standard hole cutout diameter for 8s = 7 inches
• Standard hole cutout diameter for 10s = 9 1/8
• Standard hole cutout diameter for 12s = 11 1/8
• If you don't know the actual hole cutout diameter, choose the standard cutout below.
• If we don't have your actual diameter listed below, choose the standard cutout, then provide us with your sub model #.  No worries, we can look up the specs of your subs.

Popular subwoofers that customers have used for this sub box are:

• Sundown SA series, SE series, SD series and SD3 series
• Alpine SWRT, SWR8, SWR10 and SWR12
• Kicker CompRT series, Kicker Comp series, Kicker Comp S, Comp D, CompR, CVR, L7 solobaric 8s and 10s
• JL Audio TW3 series, W1, and W0
• Rockford Punch series 8s and 10s