The Kenworth T660 semi truck model is a good example of Kenworth's commitment to providing great trucks and great value. The T660 was created to replace the T600 - while it still has the all features the trucking community knows and loves, the T660 was upgraded with smoother styling. Driving this big rig will get you noticed, and 4 State Trucks can help you customize your T660 just the way you want it. Whether it's bumpers, exhaust, fuel tanks, or something else, we've got you covered. Hit the open road in style and comfort with the best custom gear for your Kenworth heavy duty truck or 18 wheeler.