Power Acoustik 400W 3-Way 6-1/2in Front/Rear Door Speakers for 2007-2013 Sierra DOES NOT FIT EXTENDED CABPower Acoustik 400W 3Way 6.5" Front & Rear Door Replacement Speakers for Sierra Power Acoustik EF-653 (2 Pairs)6.5" Edge Series Coaxial Car SpeakersPower Handling:Peak: 400 watts per pair / 200 watts eachRMS: 150 watts per pair / 75 watts eachCarbon fiber injection molded midwooferWoven cloth surround1.2" Balanced dome mylar midrangeTwo 3/4" Balanced dome tweeters1" Voice coil on aluminum formerImproved efficiency diapraghm and magnet motor structureTop-mount Depth: 2.1"4 ohms impedanceFrequency Response: 65-20,000 HzSensitivity: 92dB2 Pairs of Speaker Install Adapters For Silverado and Sierra** Extended Cab Models are not Compatible**Designed for GM 2007-2013 Silverado 1500 and Sierra 1500 Made from high grade materials for a long lastingFits 6.5" to 6.75" Aftermaket Speakers2 Pairs Speaker Harness for GM VehiclesSpeaker Harness for 2007-2013 Silverado & SierraConnects speakers to factory harness