Hogtunes 7" Woofer Kit for Harley Touring Models with Vented Fairing Lowers FL-7W Audio solutions for the great American cruiser.For use with Hogtunes 40.4 amp (P/N 44050231).Includes one pair of 2-ohm 7" woofers, grilles (not shown) and all required hardware.A wire harness to plug into the rear channels of the amplifier is also includ An additional amp will be required if using rear speakers with this kit.