The long awaited kick panel enclosures Compatible With1967-1972 Chevrolet/GMC C10 or K10 pickups. These enclosures do not interfere with floor mounted high beam switch nor the E brake pedal. Fitment in vehicle: - Does not fit Vintage air aftermarket A/C It's common knowledge that you'll get the best sound with a component speaker – a set that includes a mid-bass / midrange*, tweeter*, and external crossover network*. Why? Simple – with very few exceptions, the speaker manufacturers put their best technology in their component speaker offerings. An external crossover network* allows them to include the right components to ensure a smooth transition from the mid to high frequencies. A smooth transition at the crossover point will improve the overall frequency response and your overall listening enjoyment. Q-Forms are designed to accommodate both the mid-bass / midrange* and the tweeter*. By locating the tweeter* and mid-bass / midrange* on the same baffle, the sound of both reach your ears at the exact same time. This eliminates acoustical problems that can result from having speakers in different physical locations on the same side of the vehicle – such as when mounting the mid-bass / midrange* in the door and the tweeter* on the sail panel. Fits / Compatible with the Following Vehicles and Years Chevrolet C10 and Suburban C10, C20, C30 1967, 1968, 1969, 1970, 1971, 1972 Also Compatible with Chevrolet K5 Blazer 1969, 1970, 1971, 1972 Also Compatible with GMC C1500, C2500, C3500 and Carryall 1967, 1968, 1969, 1970, 1971, 1972