Your search for custom car speaker box returned the following:

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 12" W3v3 subwoofer Fits 2001-2003 Honda Civic Coupe

• gray Stealthbox® enclosure fits in passenger side rear corner of trunk
• one 12" W3v3 subwoofer
• power handling: 100-500W 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 fiberglass enclosure with two 10" W1v2 subwoofers — fits 2007-up Chevrolet Silverado and GMC Sierra Extended Cab trucks (Light cashmere)

• light cashmere Stealthbox® enclosure fits under driver side rear seat
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS

Custom-fit fiberglass enclosure with two 10" W1v2 subwoofers — fits 2007-up Chevrolet Silverado and GMC Sierra Extended Cab trucks (Ebony)

• ebony Stealthbox® enclosure fits under driver side rear seat
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS

Custom-fit fiberglass enclosure with two 10" W1v2 subwoofers Fits 1988-1999 Chevrolet and GMC Extended Cab pickup models (Red)

Low Stock

1 person says 

• red Stealthbox® enclosure fits under rear seat bench
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS
  

Custom-fit fiberglass enclosure with two 10" W1v2 subwoofers Fits 1988-1999 Chevrolet and GMC Extended Cab pickup models (1995-1999, Medium neutral)

Low Stock

1 person says 

• medium neutral Stealthbox® enclosure fits under rear seat bench
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS
  

Custom-fit fiberglass enclosure with 12" W3v3-2 sub — fits 1999-2002 Chevy Silverado /GMC Sierra Extended Cab models (1999-2002, Medium oak)

Low Stock

2 people say 

• medium oak Stealthbox® enclosure installs under driver side rear seat
• one 12" W3v3 4-ohm subwoofer
• power handling: 100-500W RMS
  

Custom-fit fiberglass enclosure with 12" W3v3-2 sub — fits 1999-2002 Chevy Silverado /GMC Sierra Extended Cab models (1999-2002, Graphite)

2 people say 

• graphite Stealthbox® enclosure installs under driver side rear seat
• one 12" W3v3 4-ohm subwoofer
• power handling: 100-500W RMS
  

Custom-fit fiberglass enclosure with 12" W3v3-2 sub — fits 1999-2002 Chevy Silverado /GMC Sierra Extended Cab models (1999-2002, Medium gray)

Low Stock

2 people say 

• medium gray Stealthbox® enclosure installs under driver side rear seat
• one 12" W3v3 4-ohm subwoofer
• power handling: 100-500W RMS
  

Custom-fit fiberglass enclosure with 12" W3v3-2 sub — fits 1999-2002 Chevy Silverado /GMC Sierra Extended Cab models (1999-2002, Blue)

2 people say 

• blue Stealthbox® enclosure installs under driver side rear seat
• one 12" W3v3 4-ohm subwoofer
• power handling: 100-500W RMS
  

Custom-fit fiberglass enclosure with 10" W3v3 subwoofer Fits 1999-2006 Volkswagen Golf and GTI IV models

2 people say 

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

Custom-fit fiberglass enclosure with 10" W3v3 subwoofer Fits 1998-2005 Volkswagen Jetta models

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

Custom-fit fiberglass enclosure with 10" W3v3 subwoofer Fits 1998-up Volkswagen Beetle coupe

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

Custom-fit fiberglass enclosure with two 10" W1v2 subwoofers — fits 2007-up Chevrolet Silverado and GMC Sierra Extended Cab trucks (Light titanium)

• light titanium Stealthbox® enclosure fits under driver side rear seat
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS

Custom-fit fiberglass enclosure with two 10" W1v2 subwoofers — fits 2007-up Chevrolet Silverado and GMC Sierra Extended Cab trucks (Dark titanium)

Low Stock

• dark titanium Stealthbox® enclosure fits under driver side rear seat
• two 10" W1v2 subwoofers
• power handling: 100-600W RMS

Driver side custom-fit enclosure with 10" W6v2 subwoofer Fits 1999-2005 Chevrolet Silverado / GMC Sierra Extended Cab (with full-bench rear seat) (1999-2002, Medium oak)

5 people say 

• medium oak Stealthbox® enclosure fits driver side underneath the rear full-bench seat
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Custom-fit fiberglass enclosure with 10" W6v2 subwoofer Fits 1999-2005 Chevrolet Silverado / GMC Sierra Extended Cab (with full-bench rear seat) (1999-2002, Medium oak)

• medium oak Stealthbox® enclosure fits passenger side underneath the rear full-bench seat
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS
  

Driver side custom-fit enclosure with 10" W6v2 subwoofer Fits 1999-2005 Chevrolet Silverado / GMC Sierra Extended Cab (with full-bench rear seat) (1999-2002, Graphite)

Low Stock

5 people say 

• graphite Stealthbox® enclosure fits driver side underneath the rear full-bench seat
• one 10" W6v2 subwoofer
• power handling: 150-600W RMS