Your search for custom car speaker box returned the following:

Custom-fit fiberglass enclosure with 13" TW5-3 subwoofer — fits 2008-up Ford SuperDuty Crew Cab with 60/40 split rear bench seat (Stone)

• stone Stealthbox® enclosure installs under the rear bench seat
• one 13" W5 subwoofer
• power handling: 100-600W RMS

Custom-fit truck enclosure with shallow-mount 13.5" sub — fits 2007-up Toyota Tundra Crew Max

4 people say 

• black Stealthbox® enclosure fits behind the rear bench
• one 13.5" 13TW5-3 subwoofer
• power handling: 100-600W RMS

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer — Fits 2005-2008 Dodge Magnum

LOW STOCK

• Stealthbox® enclosure installs in the driver side storage pocket in the hatch
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer — fits 2005-08 Dodge Magnum

• Stealthbox® enclosure installs in the passenger side storage pocket in the hatch
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 2008-up Nissan Armada (with manual liftgate) (Charcoal)

• charcoal Stealthbox® enclosure fits in driver side rear corner storage pocket
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v3-4 subwoofers Fits 2007-Up Chevrolet and GMC Crew Cab trucks (Ebony)

2 people say 

• ebony Stealthbox® enclosure installs under the rear seat on the driver's side
• two 10" W3v3-4 subwoofers wired for 2-ohms
• power handling: 1000 watts RMS
  

Custom-fit fiberglass enclosure with two 10" W3v3-4 subwoofers Fits 2007-Up Chevrolet and GMC Crew Cab trucks (Light titanium)

2 people say 

• light titanium Stealthbox® enclosure installs under the rear seat on the driver's side
• two 10" W3v3-4 subwoofers wired for 2-ohms
• power handling: 1,000 watts RMS
  

Custom-fit fiberglass enclosure with two 10" W3v3-4 subwoofers Fits 2007-Up Chevrolet and GMC Crew Cab trucks (Dark titanium)

2 people say 

• dark titanium Stealthbox® enclosure installs under the rear seat on the driver's side
• two 10" W3v3-4 subwoofers
• power handling: 1000 watts RMS
  

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 2004-2007 Nissan Armada (with manual liftgate) (Steel/Titanium)

LOW STOCK

• steel/titanium Stealthbox® enclosure fits in driver side rear corner storage pocket
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v3-4 subwoofers Fits 2007-Up Chevrolet and GMC Crew Cab trucks (Light cashmere)

LOW STOCK

2 people say 

• light cashmere Stealthbox® enclosure installs under the rear seat on the driver's side
• two 10" W3v3-4 subwoofers, wired for 2-ohm mono
• power handling: 1,000 watts RMS
  

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 2002-up Subaru Impreza sedan models

• Stealthbox® enclosure fits in driver side trunk corner
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v2 subwoofers Fits 2004-2007 Nissan Titan Crew Cab (Graphite/Titanium)

• graphite/titanium Stealthbox® enclosure fits under rear passenger side seat
• two 10" W3v2 subwoofers
• power handling: 200-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v2 subwoofers Fits 2004-2007 Nissan Titan Crew Cab (Sand/Steel)

• sand/steel Stealthbox® enclosure fits under rear passenger side seat
• two 10" W3v2 subwoofers
• power handling: 200-600W RMS
  

Custom-fit fiberglass enclosure with 10" W3v3 subwoofer — fits 2005-up Mazda 3 Hatchback

• Stealthbox® enclosure fits in the spare tire well under the spare tire
• one 10" W3v3 subwoofer
• power handling: 100-500W RMS

Custom-fit fiberglass enclosure with 10" W3v3 subwoofer — fits 2004-up Mazda 3 Sedan

• Stealthbox® enclosure fits in the spare tire well under the spare tire
• one 10" W3v3 subwoofer
• power handling: 100-500W RMS
  

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 2006-up Honda Civic Sedan

2 people say 

• charcoal Stealthbox® enclosure fits in the passenger's side rear corner of trunk
• one 10" W6v2 subwoofer
• power handling: 150-600 watts RMS
  

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 2006-up Honda Civic coupe models

LOW STOCK

• charcoal Stealthbox® enclosure fits in right corner of the hatch area
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v2 subwoofers Fits 2008-up Nissan Titan Crew Cab (Almond)

LOW STOCK

• almond Stealthbox® enclosure fits under rear passenger side seat
• two 10" W3v2 subwoofers
• power handling: 200-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W3v2 subwoofers Fits 2008-up Nissan Titan Crew Cab (Dark gray)

• Stealthbox® enclosure fits under rear passenger side seat
• two 10" W3v2 subwoofers
• power handling: 200-600W RMS
  

Custom-fit enclosure with 13.5" TW5 subwoofer — fits 2008-up Toyota Sequoia

• black Stealthbox® enclosure fits under the floor of the rear cargo area
• one 13.5" TW5 subwoofer
• power handling: 100-600W RMS