Belltech 6640 Flip Kit Belltech Flip Kits provide dramatic lowering on the rear of your Sport Truck or SUV by relocating the rear axle of your truck from under to on top of the leaf spring Belltech Rear flip kits are engineered for each individual application Manufactured with high quality steel and feature a durable powder coated finish and Grade 8 hardware Belltech C-Notch are included in most Rear Flip Kits OEM ride quality with added performance, control and comfort