R/T Dual 10-Inch Chevy 1500 Crew Cab 2008 - Current Sealed Speaker Box 50.5" width x 15.5" deep x 9" front height x 7" back height (DOES NOT FIT HD MODELS) Holds dual 10" sub woofers (Downfire) - Speaker mounting depth 5 3/4" Solid 5/8" material with "Tri-lock" joint construction Sealed Enclosure Designed for: Chevy/GMC 1500 Siverado/Sierra Crew Cab 2007(new body style) - 2013